Answer:
Decreased estrogen levels
Explanation:
Estrogen levels are present in females as well as in males, but the level of them is higher in females, that is why is known as the female hormone.
On the other hand, the one that is known as the male hormone is testosterone.
When the levels of estrogen are low in women there are certain changes, such as, changes in mood, depression, anxiety, hot flashes, infertility, weak bones and several more.
