Androstenedione test is an automated blood test to measure the level of Androstenedione in our blood. It is performed to confirm various cases of Amenorrhea, Hirsutism, Infertility and Polycystic Ovarian Syndrome. Even during and after the treatment of Amenorrhea, Hirsutism, Infertility and Polycystic Ovarian Syndrome; this test is useful. This test is done under various names such as Androstenedione (A4) Blood, 4- Androstenedione, Serum A4 Blood, Androstenedione (A4), Serum A4. Androstenedione is secret mainly by the adrenal gland and production is partially controlled by ACTH hormone. Androstenedione is a main sex- steroid antecedent.