All Men Have Been Females at the Beginning

Men can’t produce milk or give birth. Then why do they have nipples? Why the magic of evolution didn’t get rid of man’s nipples? To respond this question we must go back when the fetus is being developed.  The fetus has no sex to their 8^th week. So all fetuses are equal to their 8^th week and during this period we see secretion of compounds who would later determine the sex.

The sex of one person is finally determined during the process called fertilization. If the Y chromosome is present after the fertilization, then the fetus is male. Y chromosome activates in the 8^th week of the pregnancy. Then the fetus starts secreting testosterone, which is a hormone.

This hormone give orders to the organs to develop into male sex organs. Penis starts to evolve from the clitoris. Ovaries go down and they are develop into testicles. The nipples remain developed but the breast don’t start to develop. So the nipples are leftovers from the fetus’ ventures in their mother’s stomach.

In the first few weeks of the pregnancy, every fetus passes through the female stage and after it, the Y chromosome is crucial for determining the sex. If the Y chromosome is gone, then the fetus develops into female.