Amenorrhea
Amenorrhea is the absence of menstruation during reproductive age in women.
It can be primary (when periods never start by age 15) or secondary (when periods stop for 3+ months after being regular).
Causes include hormonal imbalance, pregnancy, stress, excessive exercise, eating disorders, or medical conditions like PCOS.
Symptoms may include infertility, headache, hair loss, or milky nipple discharge (depending on the cause).
Treatment depends on the underlying cause and may involve lifestyle changes, medications, or hormone therapy.









