Lupigest 100 Capsule contains 100 mg of natural micronized progesterone, a bioidentical hormone essential for regulating the menstrual cycle and maintaining pregnancy. Progesterone plays a critical role in preparing the endometrium for implantation of a fertilized ovum and supports early pregnancy by maintaining the uterine lining. Lupigest 100 is commonly prescribed for conditions associated with progesterone deficiency, including luteal phase defects, amenorrhea, and threatened or recurrent miscarriage. It is also utilized in hormone replacement therapy (HRT) for postmenopausal women to counteract the effects of estrogen on the endometrium, thereby reducing the risk of endometrial hyperplasia and carcinoma. The micronized formulation enhances absorption and bioavailability, ensuring effective plasma levels of progesterone. Administration should follow medical guidance, typically taken orally or vaginally, depending on the indication. Common side effects may include dizziness, headache, breast tenderness, and mild gastrointestinal disturbances. Contraindications include known hypersensitivity to progesterone, unexplained vaginal bleeding, active thromboembolic disorders, and certain hormone-sensitive cancers. Regular monitoring by a healthcare professional is advised to assess therapeutic efficacy and detect any adverse effects. Lupigest 100 Capsule is a valuable therapeutic agent in managing progesterone-related disorders under appropriate clinical supervision.