The preparation for spermatogenesis starts in the mother’s womb. In the beginning, the fetus has cells for both male and female reproductive systems. After the sex determination, the male fetus gets testosterone, which promotes male reproductive system formation. It also eliminates the apparatus for female reproductive organs.
At the time of puberty, men undergo two types of sexual developments:
This sexual development includes the growth of primary sexual organs.
Testes develop in the pelvis of a male fetus. In the 7th month of gestation, they descend and adjust in the scrotum under the effect of testosterone. Some male children are born with undescended testicles. Typically, these testes should come down by 4 to 6 months. However, the undescended testes after this duration impact male fertility and need treatment.
The secondary sexual characteristics determine other features in males. These features indicate sexual maturity and include:
Underdeveloped secondary development may be the first sign of male infertility, and may indicate a need for male fertility testing.