Microgest 100mg Injection is a natural female hormone important for regulating ovulation (release of an egg from a woman's ovary) and menstruation. It helps restore menstrual cycles in women whose periods have stopped. It is also used in the treatment of infertility. Microgest 100mg Injection is generally given by a healthcare professional and should not be self-administered at home. You should use Microgest 100mg Injection as your doctor has advised. Do not use more or less than advised and do not use it for longer than recommended. You may be asked to continue taking this medicine for a period after you get pregnant.The most common side effects include abdominal cramps, back pain, breast tenderness, hypotension and dizziness, hypercoagulant state, and vaginal bleeding. Your doctor may suggest ways to reduce or prevent these. Occasionally, it may cause a severe allergic reaction requiring urgent medical attention.Inform your doctor if you have a history of breast cancer, unusual vaginal bleeding, or liver, kidney, or heart disease. Inform your doctor about all other medicines that you are taking as they may affect, or be affected by, this medicine. You will probably have several tests both before and during treatment with this medicine. Microgest 100mg Injection can alter your thinking or reactions and you may feel very tired so be careful while driving or doing anything that requires you to be alert.