Reproductive System

Female Reproductive Organs

• The female reproductive organs include the vagina, uterus, fallopian tubes, ovaries, and external genital organs.

Male Reproductive Organs

• The male reproductive organs include the penis, testicles, epididymis, vas deferens, and prostate gland (1^✔ ✔Trusted Source
  Review: Introduction to the Reproductive System
  
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Smallest and Largest cell

• The ovum is the largest cell in the human body, with a diameter of 0.1 mm.
• The sperm is the smallest cell in the human body (2^✔ ✔Trusted Source
  Molecular Biology of the Cell
  
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Lifespan of an Ovary

• Female ovaries contain about 1-2 million eggs at birth, but only 300,000 ovaries make it to puberty (3^✔ ✔Trusted Source
  Biological versus chronological ovarian age: implications for assisted reproductive technology
  
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• An egg can have a lifespan of 12-24 hours after it is released from the ovary, while a sperm can have a lifespan of 36 hours (4^✔ ✔Trusted Source
  Natural methods of family planning
  
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Sperm Production

• A healthy male testes can produce around 500 million sperm cells daily, and these testes can also release up to 75 million or more sperm cells during an ejaculation (5^✔ ✔Trusted Source
  Semen analysis
  
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• The process of sperm production (spermatogenesis) requires an optimal temperature that is around 2-3 ºC lower than the normal human body temperature; this is why the scrotum, which contains testicles, is present outside the body (6^✔ ✔Trusted Source
  The process of spermatogenesis liberates significant heat and the scrotum has a role in body thermoregulation
  
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Male Hormone

• Androgens are the hormones that are responsible for 'manly' characteristics in men. A deep voice, body hair, height, and muscle mass are some of these characteristics (7^✔ ✔Trusted Source
  Androgens and hair growth
  
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Sexual Function

• Alcoholism, smoking, and drug abuse greatly reduce sexual function, while exercise and a healthy diet can improve it (8^✔ ✔Trusted Source
  The risk of sexual dysfunction associated with alcohol consumption in women: a systematic review and meta-analysis
  
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Ovulation

• Ovulation is the process by which a mature egg is released from one of the ovaries during the menstrual cycle.
• Ovulation usually occurs once a month, about two weeks before the start of next menstural period.

Fertilization

• A zygote is a fertilized egg cell that is formed by the fusion of both the sperm and the ovum (9^✔ ✔Trusted Source
  Embryology, Week 1
  
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• Fertilization is mostly possible when the female is in the middle of her menstrual cycle. This is when the hormones promoting pregnancy are at their peak (10^✔ ✔Trusted Source
  Menstrual Cycle Proliferative And Follicular Phase
  
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Female Uterus

• A female uterus is about 3 inches long and 2 inches wide normally, but during pregnancy, the uterus can expand up to 20 times its normal size. The uterus contains one of the strongest muscles in the female body (11^✔ ✔Trusted Source
  Anatomy, Abdomen and Pelvis: Uterus
  
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• Fallopian tubes are about 12 cm long and only as wide as a sewing needle (12^✔ ✔Trusted Source
  Anatomy, Abdomen and Pelvis: Fallopian Tube
  
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• The cervix is a small, cylindrical, and conical canal that can be referred to as the “neck of the uterus.” (13^✔ ✔Trusted Source
  Physiology, Uterus
  
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Pregnancy

• At 8 weeks of pregnancy, vital organs like the brain, heart, skin, and stomach are all developed within the embryo, measuring only an adult’s thumb (14^✔ ✔Trusted Source
  Fetal Development: Week 8
  
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