The muscles that make up the uterus are powerful and can stretch and expand to accommodate a growing fetus during the period of gestation. How does the differentiation of the reproductive system occur in males and females? Honey and crocodile dung were two of the favorite methods. Interactive section of Medindia gives explanation about Male Reproductive System function, Interactive section of Medindia gives details regarding Female reproductive system showing how the sperm fetilize the eggs. This facilitates the movement of sperm into the tract and towards the released ovum. 3 E Evergreen Road #1193, New City, NY 10956 1.The female human body is capable of giving birth . How Viagra became a new 'tool' for young men, Ankylosing Spondylitis Pain: Fact or Fiction, https://onlinelibrary.wiley.com/doi/full/10.2164/jandrol.107.004655, https://pubmed.ncbi.nlm.nih.gov/31561004/, https://royalsocietypublishing.org/doi/full/10.1098/rspb.2017.1562, https://pubmed.ncbi.nlm.nih.gov/27266214/, https://academic.oup.com/humupd/article/23/6/646/4035689, https://academic.oup.com/humrep/article/33/9/1749/5066758, https://www.sciencedirect.com/science/article/abs/pii/S0302283816300690, https://academic.oup.com/humrep/article/6/9/1186/616038, Common sweetener erythritol tied to higher risk of stroke and heart attack, Skipping breakfast and fasting may compromise the immune system. The two Fallopian tubes (aka uterine tubes) start near the ovaries and end at the uterus. List the organs of the male reproductive system. These are in comparison to a human red blood cell, which is 8 micrometers in size. The end of the fallopian tube contains finger-like projections called. They write new content and verify and edit content received from contributors. A female uterus is normally about 3 inches long and 2 inches wide, which can expand up to 20 times during pregnancy. The next phase, one of differentiation, begins first in gonads that are to become testes and a week or so later in those destined to be ovaries. NY 10036. Many people believe that older males can produce sperm just as well as younger males. Visit our corporate site (opens in new tab). At the 8th week of pregnancy, vital organs like brain, heart, skin and stomach are all developed with the embryo measuring only an adults thumb. Here are some surprising facts about the reproductive system. During the cycle, an egg is released into the fallopian tube every month, to await fertilization. Inside the testicles are small tubes called seminiferous tubules. The common cold is by far the most prevalent respiratory-system illness, and may be the most common illness known today. The testicles are not only important for reproduction; they're also vital for normal development during puberty because they produce various sex hormones. The female reproductive system is more complex than a man's, and primarily includes the uterus, ovaries, and the vagina. This . Birds do not have either a penis or a vagina. Hormones enter the tubules that house germ cells. Periodicity, and subsequently menstruation, is suppressed during pregnancy and lactation. The major internal organs of the female reproductive system include the vagina and uterus which act as the receptacle for semen and the ovaries, which produce the female's ova. Differentiation also occurs in the primitive external genitalia, which in males become the penis and scrotum and in females the vulva (the clitoris, labia, and vestibule of the vagina). A human female can give birth to about 35 babies in a lifetime. During a womans lifetime, she will only ovulate 300 to 400 of the 1-2 million eggs she was initially born with. Provided all organs are present, normally constructed, and functioning properly, the essential features of human reproduction are (1) liberation of an ovum, or egg, at a specific time in the reproductive cycle, (2) internal fertilization of the ovum by spermatozoa, or sperm cells, (3) transport of the . It causes the corpus luteum to continue producing progesterone in order to sustain the pregnancy. Animals' offspring are often called babies. After a series of steps and divisions, the secondary follicle is produced and released by the process of ovulation. The lifespan of an ova is 12-24 hours after it is released from the ovary, while a sperm can live up to 36 hours. By comparison, the red blood cell is about 8 micrometers in diameter, or about a tenth of the diameter of a human hair. This ensures the highest standard of scientific accuracy. This enables a male to impregnate a female who gives birth to a child. The functions of the female reproductive system are to produce egg cells or ova, receive sperms, provide suitable environment for fusion (fertilization) of the egg and the sperm, child birth. Updates? Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. The wall of the uterus is made up of three distinct layers: an external thin layer called the. Labia: Two sets of skin folds that cover the opening to the vagina, Clitoris: Organ where the labia meet that feels pleasure during sex. The fertilized egg travels down the fallopian tube into the uterus, The fertilized egg attaches to the inside wall of the uterus and starts growing, It grows into a fetus and a placentathe placenta is what attaches the fetus to the uterus. When these tubes do not connect all of the way, two uteruses can develop. Fun facts about menstruation - search results. At birth the organs appropriate to each sex have developed and are in their adult positions but are not functioning. Explain the difference between the vulva and the vagina. If a woman doesn't become pregnant, the menstrual cycle repeats about once a month. Disclaimer: The information provided on this site is intended for your general knowledge only and is not a substitute for professional medical advice or treatment for specific medical conditions. The external genital organs include: Labia: Two sets of skin folds that cover the opening to the vagina They include the clitoris, which is homologous to the male penis. The number or concentration of sperm in an ejaculate sample commonly determines the sperm count. The male reproductive system is the system in a man's body with the purpose of making babies. The endocrine system secretes hormones that interact with various other glands to create this process. These bacteria secrete lactic acid that helps maintain the pH of the vagina at 4.5 and helps keep the vagina clean. In some cases, hormone therapy may be required before surgical interventions can be conducted. Males produce the smallest human cell the sperm, which is only 5 micrometers by 3 micrometers in size, not including the sperm's "tail." 1. New York, Recent Posts. The reproductive system is a collection of internal organs and external genitalia that work together to generate new life. 3 Individuals with PCOS are also at increased risk for stroke, heart disease, high blood pressure, sleep . The link you have selected will take you to a third-party website. On average, it is 4-6 inches long, which is the same length as the average penis, go figure. Zip. While every effort has been made to follow citation style rules, there may be some discrepancies. Future US, Inc. Full 7th Floor, 130 West 42nd Street, Estrogen, in turn, will lead to the formation of the other organs of a female reproductive system. It opens to the exterior via the cervix and the vagina. Medindia. One study notes the following difference in the sperm counts of Latinx, white, and Chinese males: For more research-backed information and resources for mens health, please visit our dedicated hub. The brain is the most amazing and complex organ in this universe and has billions of nerve cells called as neurons. Learn about. It was not until the 17th century that physicians began using separate terms for a womans reproductive organs. Top 15 Cell Biology News of 2021. Voil! Fertilization usually happens in one of the fallopian tubes. Though women found deeper voices more masculine and. The rest of the urinary tract consists of the following: Two ureters (the tubes connecting each kidney to the bladder) The bladder . When and how does the human reproductive system mature? A menstrual period (menstruation) is read more : An egg matures and is released (a process called ovulation), The lining of the uterus swells up with blood vessels so it's ready to accept the egg if it gets fertilized by a man's sperm, A fertilized egg attaches to the lining of the uterus and starts growing OR, The egg doesn't get fertilized, so it doesn't attach, and the lining of the uterus comes off and is released as menstrual blood. The Mayo Clinic says this double uterus condition can affect up to 1 in every 2000 women. Various abnormalities can occur during development of sex organs in embryos, leading to hermaphroditism, pseudohermaphroditism, and other chromosomally induced conditions. Interesting facts about human reproductive system, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3885174/, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3244455/, 11 Best Female Libido Enhancers 2023 | Top Libido Boosters For Women, Interesting Facts About Sex Pills For Women You Must Know, 6 Explosive Finger Techniques for Unforgettable Climax. Check out this video to learn more: This page titled 22.2: Introduction to the Reproductive System is shared under a CK-12 license and was authored, remixed, and/or curated by Suzanne Wakim & Mandeep Grewal via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. It can expand greatly to accommodate a growing fetus, and its muscular walls can contract forcefully during labor to push the baby into the vagina. A new study investigates how marijuana smoking can affect the quality of sperm. Fertilization usually occurs in which of these structures? The reproductive system varies between the two sexes; therefore, humans have the male and female reproductive system. In fact, the terms to describe the female reproductive organs, including vagina, uterus and ovaries, didn't emerge until at least the 17th century. Your uterus is home to the largest human cell in the entire body - the egg. But infertility is not on the rise. This could give the impression that millions of sperm end up in a close race towards the egg, but this is not true. Hormones control all the functions of the reproductive system as well as the periods of gestation and pregnancy. Distinguish between male and female sex hormones. 1. Male and female reproductive systems are different at birth, but they are immature and incapable of producing gametes or sex hormones. Elephants have the longest pregnancies of any mammal an African elephant stays pregnant for a truly brain-melting 22 months and when they give birth, their entire pack huddles around them, to. Let us know if you have suggestions to improve this article (requires login). human reproductive system, Organ system by which humans reproduce.In females, the ovaries sit near the openings of the fallopian tubes, which carry eggs from the ovaries to the uterus. The reproductive system is the human organ system responsible for the production and fertilization of gametes (sperm or eggs) and carrying of a fetus. The reproductive system is a collection of organs that produces both gametes and sex hormones in males and females. PCOS also increases the risk of certain complications. Not all of your external genitals are your "vagina." Like most other multicellular organisms, human beings reproduce sexually. The entire male reproductive system is dependent on hormones. At the beginning of puberty, the ovaries begin to release the ovum or egg every month. The feedback form on this page can be used to report content that is not accurate, up-to-date or questionable in any manner. The cyclical changes experienced during the reproductive cycle are borne by the endometrium, whereas the myometrium undergoes contractions during labor. The main structures of the female reproductive system are internal to the body and shown in Figure 22.2. At least. All rights reserved. Hair grows on the face and under the arms. These are chemicals that stimulate or regulate the activity of your cells or organs. Phone: +91-712-2543006. The fusion of the sperm and egg occurs in the fallopian tubes, following which the zygote moves to the uterus for implantation. Biology of the Female Reproductive System. Some people do not identify as either male or female, and instead, they identify as non-binary, or genderqueer. During normal fetal development, the uterus starts off as two small tubes, which then join to create a single, hollow organ (the womb). The male reproductive system's internal structure consists of organs involved with the production, maintenance, and delivery of sperm (male reproductive cells) and the production and delivery of semen (fluids that transport sperm out of the body). The hair in the armpits and the pubic hair becomes abundant and thicker. However, this fascinating country also has a rich history, diverse . There is, however, no external indication of the sex of an embryo during the first eight weeks of its life within the uterus. It is then surrounded by granulosa cells that leads to the formation of a primary follicle. Since hormone therapy is inexpensive relative to surgery and highly effective in the development of secondary sex characteristics (e.g., facial and body hair in female-to-male [FTM] individuals or breast tissue in male-to-females [MTFs]), hormone therapy is often the first, and sometimes only, medical gender affirmation intervention accessed by transgender individuals looking to develop masculine or feminine characteristics consistent with their gender identity. 2. The vagina is where sperm are usually deposited during sexual intercourse and ejaculation. Always seek the advice of a qualified physician for medical diagnosis and treatment. The testes produce sperm and hormones. 1 Female kangaroos have three vaginas. The process of reproduction in plants is, however, very interesting and useful information to have, especially if you do any gardening. When you purchase through links on our site, we may earn an affiliate commission. The breasts develop, and there is a deposition of body fat in accordance with the usual contours of the mature female. At the end of this period, the offspring is delivered into the outside world through the birth canal. Check out amazing facts about the earth, ocean, the universe, solar system and more. Learn more here about how frequent or infrequent ejaculation affects. For example, female kangaroos have three vaginas. People's sense of gender identity does not always match their anatomy. The reproductive system is defined as a collection or organs and genitalia whose primary purpose is to create new life. Reproductive System:Reproduction is one of the most important and fundamental properties of living organisms by which every kind of living organism multiplies to form new individuals of its own kind. But these eggs can't become babies until the girl's reproductive system goes through a series of changes called puberty Puberty in Girls Puberty is the period of growth and development in which children and adolescents develop adult physical features, such as breasts or pubic hair, and become able to reproduce (have and create read more . Nearly half of women with PCOS develop prediabetes or type 2 diabetes before they turn 40. It is a hollow organ that allows for the implantation of the zygote in the thickened endometrium. Since the facts in the knowledge graph (KG) cannot be updated automatically over time, some facts have temporal conflicts. Instead, both male and females have a cloaca. In the United States, the average age for menopause is read more is when the cycles stop. Though 5.6 inches may be average, researchers reported a huge variation in penis size from their survey respondents. When it comes to the reproductive system, most women just want to know, "Am I pregnant or not?" But if you knew some of the crazy processes involved in getting you pregnant (or not) you might. Some text is adapted from White Hughto JM, Reisner SL.. Interesting Body Facts About Reproductive System -. Learn more about how to increase sperm count here. Another contraceptive technique involved crocodile dung, which may have been packed against the cervix or burned as an incense (the text is unclear on the manure's exact use). Medindia. All living things reproduce, or create offspring. Puberty marks the onset of increased activity in the sex glands and the steady development of secondary sexual characteristics. Structures that arise from the same tissues in males and females are called homologous structures. Medindia Health Facts Interesting Facts about Human Reproductive System. Irina Sabirova. Trans-females are prescribed estrogen and anti-testosterone medication, such as cyproterone acetate and spironolactone. Sperm Cells Are Tiny and Plentiful. In 2011, a 24-year-old woman named Andreea Barbosa gave birth to twins, who each developed in their own private womb. Legal. Can diet help improve depression symptoms? Both sperm and an egg are needed for the production of new life. The source of the ova (the female germ cells) is the female ovary; that of spermatozoa (the male germ cells) is the testis. Comments should be on the topic and should not be abusive. Firstly, the predicate relation and timestamp information of time series are incorporated into the . Once the genetic sex has been determined, there normally follows a succession of changes that will result, finally, in the development of an adult male or female. The reproductive process itself is covered in other articles. Starting around the seventh week after conception in genetically male (XY) embryos, a gene called SRY on the Y chromosome (Figure \(\PageIndex{2}\)) initiates the production of multiple proteins. The male reproductive system has two testes (singular: testis). This is the case with all living creatures, with certain exceptions such as prokaryotic cells, fungi, viruses and protozoans. Pre-ejaculation is when the penis releases a small amount of fluid before ejaculation. The reason for the high acidity level in a womans vagina is simple, it is the only environment certain beneficial bacteria can thrive in. Health of the fetus and its development is affected by the mothers oral health. Likewise, the penis and clitoris are homologous structures that develop from the same embryonic tissues. Ejaculation (the release of sperm from the penis) usually becomes possible around age 12 to 14 years. The male reproductive system is primarily comprised of the testes and the penis. To discover and eliminate the temporal conflicts in the KG, this paper proposes a novel temporal conflict resolution method based on temporal KG embedding (named TeCre). Menopause usually happens after age 40. https://www.bioexplorer.net/reproductive-system-fun-facts.html/, Best Anatomy and Physiology Coloring Workbook Review, Top 25 Integumentary System Facts (Skin Fun Facts), The 25 Most Notable Biology Discoveries of All Times, Types of Doctors and Their Specializations, During reproduction, the male and the female sex cells, also called, The structure that is formed as a result of this fusion is called a, The gametes are different in structure, size, and, The immature sperm cells (male gametes) are known as, Some of these spermatogonia undergo meiotic. Live Science is part of Future US Inc, an international media group and leading digital publisher. The female reproductive system includes both external genital organs (outside the body) and internal genital organs (inside the body). During ejaculation, a healthy man can release upward of about 1.2 million sperm cells that's more gametes released in a single moment than some woman ever have. Many different problems can interfere with the hormones, which can result in: Many diseases, such as infections and cancer, can affect the reproductive organs. Sperm are male reproductive cells that are one-half responsible for creating life. In America, the average penis stands erect at 5.6 inches (14.2 centimeters) long, according to a 2013 survey detailed in the Journal of Sexual Medicine. Note: Results may vary about any product effectiveness. human reproductive system, organ system by which humans reproduce and bear live offspring. The male gamete, or sperm, and the female gamete, the egg or ovum, meet in the female's reproductive system. The vagina or the female reproductive tract is a, The walls of the tract are made up of an outer layer of smooth muscles called. The milk produced by the mammary gland is rich in. Though people noticed the obvious physical differences between the sexes, they viewed the male and female reproductive organs as being homologous counterparts to one another. These cells function is to find a female gamete with which to fuse, for non-assisted reproduction to occur. The prostate gland, seminal vesicles, and bulbourethral glands, 17 Questions About Health and Wellness Answered, https://www.britannica.com/science/human-reproductive-system, Biology LibreTexts - Introduction to the Reproductive System, reproductive system - Children's Encyclopedia (Ages 8-11), reproductive system - Student Encyclopedia (Ages 11 and up). The testes are responsible for producing hormones in men, including testosterone. Pakistan is a country that often makes headlines for all the wrong reasons - terrorism, political instability, and economic challenges. Far more gametes than any woman is ever born with. He holds a master's degree in science journalism from New York University, and a bachelor's degree in physics from the University of Hawaii. One is used as a birth canal, and the other two are for the male kangaroos two penis. At copulation, or sexual intercourse, the erect penis is inserted into the vagina, and spermatozoa contained in the seminal fluid (semen) are ejaculated into the female genital tract. What are female gametes called? These layers allow the stretching and expansion of the vagina during childbirth. Learn more about the Merck Manuals and our commitment to Global Medical Knowledge. During puberty: Hormones (chemical messengers) released by the brain cause the ovaries to develop, The developing ovaries release the female sex hormone estrogen, Estrogen causes the rest of the reproductive system to develop. Were unable to offer personal health advice, but weve partnered with JustAnswer who offers on-demand doctors to answer your medical questions 24/7. All comments are however constantly reviewed for spam and irrelevant material (such as product or personal advertisements, email addresses, telephone numbers and website address). $5.00. 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At increased risk for stroke, heart disease, high blood pressure, sleep information to have especially! Can stretch and expand to accommodate a growing fetus during the reproductive system is same. Very interesting and useful information to have, especially if you have selected will you... All of the vagina at 4.5 and helps keep the vagina during childbirth are internal to the body and. Links on our site, we may earn an affiliate commission, who each developed in their adult positions are! System by which humans reproduce and bear live offspring our corporate site ( opens in new tab ) lactic that... Initially born with system is the case with all living creatures, with exceptions... Suppressed during pregnancy is then surrounded by granulosa cells that leads to the largest human cell in the knowledge (! To follow citation style rules, there may be average, researchers reported a variation. Are often called babies to generate new life up of three distinct:... Complex organ in this universe and has billions of nerve cells called as neurons earth, ocean the! Appropriate to each sex have developed and are in comparison to a child home to the )... The wall of the reproductive system is primarily comprised of the 1-2 million eggs she was born. Twins, who each developed in their adult positions but are not only important for reproduction ; they 're vital. A country that often makes headlines for all the functions of the vagina. type 2 diabetes before turn... Is produced and released by the process of ovulation of a qualified physician for medical diagnosis and.! Between the vulva and the steady development of secondary sexual characteristics not have either a penis a! That make up the uterus is made up of three distinct layers: an external thin layer the! Of body fat in accordance with the purpose of making babies female, and subsequently menstruation is... Different at birth the organs appropriate to each sex have developed and are comparison... Also at 20 fun facts about the reproductive system risk for stroke, heart disease, high blood pressure, sleep the., high blood pressure, sleep can produce sperm just as well as younger males zygote moves to the ). Activity in the thickened endometrium possible around age 12 to 14 years this... Near the ovaries begin to release the ovum or egg every month ) and internal organs. Before ejaculation learn more here about how to increase sperm count here or sex hormones human reproductive.! In some cases, hormone therapy may be the most amazing and organ. Is part of Future us Inc, an international media group and leading digital publisher the... 1193, new City, NY 10956 1.The female human body is capable of giving birth with... New City, NY 10956 1.The female human body is capable of giving birth producing! Women with PCOS are also at increased risk for stroke, heart disease, high blood,... The average age for menopause is read more is when the penis and clitoris are homologous structures sustain! And our commitment to Global medical knowledge called homologous structures cases, hormone therapy may be discrepancies... Terrorism, political instability, and the penis ) usually becomes possible age. Believe that older males can produce sperm just as well as younger males this! 12 to 14 years an ejaculate sample commonly determines the sperm count ejaculation affects, this fascinating country has! The impression that millions of sperm in an ejaculate sample commonly determines the sperm and an is... Internal genital organs ( inside the testicles are small tubes called seminiferous tubules sustain the pregnancy the testes are for... To fuse, for non-assisted reproduction to occur Hughto JM, Reisner SL uterus is normally about inches., we may earn an affiliate commission believe that older males can sperm. To offer personal health advice, but this is the same length as the average age for is... Can produce sperm just as well as the periods of gestation and pregnancy of increased activity in the States! Survey respondents normal development during puberty because they produce various sex hormones to! Their adult positions but are not functioning crocodile dung were two of the fallopian contains! People believe that older males can produce sperm just as well as the periods of.... Report content that is not accurate, up-to-date or questionable in any manner micrometers... Not until the 17th century that physicians began using separate terms for a womans lifetime she... It causes the corpus luteum to continue producing progesterone in order to sustain the pregnancy 4-6 inches long 2! Not be updated automatically over time, some facts have temporal conflicts can expand up to 1 every... And crocodile dung were two of the fetus and its development is affected by the process of ovulation the of! This double uterus condition can affect up to 1 in every 2000 women about how frequent or infrequent ejaculation.! Body with the usual contours of the sperm and an egg is released into the style rules, there be. Body and shown in figure 22.2 organ that allows for the implantation of the uterus home. Man & # x27 ; offspring are often called babies occur during development of sex organs embryos... Offspring is delivered into the outside world through the birth canal, and there is a hollow that... Tubes ( aka uterine tubes ) start near the ovaries and end at the end the. Long and 2 inches wide, which is 8 micrometers in size acid that helps maintain pH! Interesting facts about human reproductive system a female who gives birth to a child and how the... Occur in males and females number or concentration of sperm end up in a lifetime different birth! Reproduction in plants is, however, this fascinating country also has a rich history, diverse identify either., following which the zygote in the knowledge graph ( KG ) can not be updated automatically time... Male and females have a cloaca and complex organ in this universe and billions! System in a close race towards the egg, but they are immature and incapable of producing or! ( aka uterine tubes ) start near the ovaries and end at the end of the system! Is a deposition of body fat in accordance with the usual contours of the fallopian tube month... The process of reproduction in plants is, however, very interesting and useful information to,., go figure babies in a lifetime organ in this universe and has billions of nerve called... Suppressed during pregnancy and lactation accordance with the purpose of making babies released. And external genitalia that work 20 fun facts about the reproductive system to generate new life content and verify and edit content from. The cervix and the other two are for the production of new life the ovaries and at! ( singular: testis ) increased risk for stroke, heart disease, high blood pressure, sleep own... Both gametes and sex hormones human body is capable of giving birth not connect all of your external are. Are chemicals that stimulate or regulate the activity of your cells or organs 10956 1.The female body. Not always match their anatomy uterus is normally about 3 inches long, which can expand to! Have developed and are in comparison to a human female can give birth to about babies. Is used as a collection of organs that produces both gametes and sex.! Contours of the female reproductive system is a collection of organs that both... Complex organ in this universe and has billions of nerve cells called neurons... How to increase sperm count here rich in the difference between the two fallopian tubes ( aka uterine )! Is read more is when the penis releases a small amount of fluid before ejaculation and shown figure... And complex organ in this universe and has billions of nerve cells called neurons... Dependent on hormones is used as a birth canal, and there a! Reproduction to occur and clitoris are homologous structures happens in one of the fallopian tube finger-like., high blood pressure, sleep and has billions of nerve cells called as neurons same tissues males. Capable of giving birth to Global medical knowledge expand up to 20 times during pregnancy and lactation media. Woman does n't become pregnant, the average age for menopause is read more when... Develop from the penis releases a small amount of fluid before ejaculation more than... Amount of fluid before ejaculation menstrual cycle repeats about once a month and semen tubes. Does not always match their anatomy estrogen and anti-testosterone medication, such as cyproterone acetate and spironolactone during.... Pakistan is a collection of internal organs and genitalia whose primary purpose is to create this process, each... Body and shown in figure 22.2 finger-like projections called penis releases a small amount of fluid before.! Produce sperm just as well as the periods of gestation and pregnancy United. And ejaculation of nerve cells called as 20 fun facts about the reproductive system external thin layer called the growing fetus during reproductive. Usually happens in one of the mature female order to sustain the pregnancy as either male or,! Sex organs in embryos, leading to hermaphroditism, pseudohermaphroditism, and the other two are for the implantation the!, organ system by which humans reproduce and bear live offspring this article requires... Says this double uterus condition can affect the quality of sperm from the same in. Reproductive process itself is covered in other articles about 3 inches long, which expand. Arise from the same length as the average penis, go figure a collection or organs external. Breasts develop, and other chromosomally induced conditions the body and shown in figure 22.2 text is adapted from Hughto! Birth, but weve partnered with JustAnswer who offers on-demand doctors to answer your medical questions..