修正內容： Dr. Hsin-Huei Chang is dedicated to providing women with meticulous and comprehensive care, aiming to offer optimal medical assistance for issues related to menstruation, pregnancy, and childbirth. Her specialties include: 1. Menstrual Disorders and Leucorrhea: Heavy menstrual bleeding, dysmenorrhea, premenstrual syndrome (PMS), endometriosis, adenomyosis, chocolate cysts, uterine fibroids. External vulvar itching, vaginitis, chronic pelvic inflammatory disease. 2. Infertility and Postpartum Care: Polycystic ovary syndrome (PCOS), fallopian tube obstruction. Postpartum recuperation, mastitis. 3. Menopausal Syndrome: Hot flashes, night sweats, insomnia, irregular periods, abnormal menstrual volume, vaginal dryness, osteoporosis.