Philadelphia — For years, Cathleen “Cat” Brown, a Philadelphia obstetrician and gynecologist, would listen to patients complaining of hot flashes, brain fog, and painful sex and prescribe estrogen as ...

Isabel Casimiro, MD, PhD, is an endocrinologist at the University of Chicago in Illinois. As a physician-scientist in molecular biology, she uses her research on diabetes, lipid disorders, ...

Chronic fatigue, unexplained weight loss or gain, infertility, and hair loss can all signal a hormonal imbalance. You might consider a hormone test if you’re experiencing these or more. Hormone tests ...

Testosterone levels peak in the morning and decrease throughout the day. Testosterone levels in men typically decrease by about 1% per year after their 30s. Low testosterone can cause symptoms like ...