Changes in Body Hair
Before puberty, you have little to no body hair. Afterwards, body hair covers a large portion of the body, though its appearance depends on androgens, a type of sex hormone. Men have more androgens than women, which is why males have more body hair. As we age, our body hair changes. Yet, if you suddenly lose or gain a lot of body hair, you should make note, as it usually means you have a hormonal imbalance.
Women who have excessive body hair, irregular periods, and trouble with weight gain may be suffering from a condition called polycystic ovarian syndrome (PCOS). With PCOS, the ovaries are enlarged and have follicles filled with fluid. Other symptoms include insulin resistance, weight gain, acne, and male-patterned hair loss.