Women have millions of eggs in ovaries, which decrease to few hundred by adulthood. Approximately 400 eggs are released during reproductive years. Eggs travel through fallopian tubes to uterus during ovulation. Fertilization occurs within 24 hours after egg meets sperm
Sperm are produced in testes' seminiferous tubules. Testes produce over 12 billion sperm monthly. Sperm production takes approximately 70 days
Horses can produce up to 60 billion sperm cells per ejaculation. Only 7 million sperm cells can fertilize an egg. Typical mature male horse produces 1-5 ml semen per ejaculation. Horses can ejaculate up to 1/4 cup or more in spring
Semen volume refers to fluid produced during a single sexual event. Sperm concentration indicates number of sperm cells per milliliter. Higher sperm concentration increases breeding likelihood
Testicles are male gonads located in scrotum, extending from abdominal wall. Average adult testicle measures 5x2x3 cm, with normal volume 15-25 cm³. Testicles are covered by tunica albuginea and contain seminiferous tubules. Testicular temperature must be slightly below body temperature for optimal sperm production
Sperm are haploid cells containing 23 chromosomes, about 0.05mm long. Male children are born with reproductive organs but no mature sperm. Average ejaculation contains 180 million sperm per milliliter