Amenorrhoea :
Amenorrhea refers to periods that are missed more than once. There are two kinds of amenorrhea, primary and secondary. Primary amenorrhea is when a person is older than 15 and has never got first period. Secondary amenorrhea is when a person doesn't get a period for more than three months and may occur due to pregnancy, stress, lactation, and a chronic illness. The menstrual cycle is controlled by a complex system of hormones, which prepares the uterus for a possible pregnancy. Factors that affect the period issues are the hypothalamus, ovaries, and uterus. Symptoms of amenorrhea are hot flashes, vaginal dryness, headaches, milk leaking from nipples, acne, vision changes and excess hair growth. Risk factors include a family history of amenorrhea, genetic conditions that affect the uterus and ovaries, obesity, eating disorders, over exercise, poor diet, and stress. Complications like osteoporosis, infertility and pelvic pain may develop. Diagnosis is made by pregnancy tests, blood tests, genetic testing, MRIs and ultrasound.