Dysfunctional uterine bleeding causes irregular or heavy periods due to hormonal imbalance. Learn who's affected, how it's diagnosed, and treatment options.
Masturbation frequency in boys varies widely and is usually normal. Learn what research says about typical patterns, physical effects, and when it may be worth addressing.
A positive test result doesn't always mean what you think. Learn how test type, disease prevalence, and accuracy all shape what your result really means.