This test is a about the hormones that affect a woman’s fertility. It is also done to determine the hormonal causes in case of infertility. The treatment is then prescribed by the doctor once the range of the hormones is known. FSH (Follicle-stimulating hormone), LH (Luteinizing Hormone), Prolactin and TSH (Thyroid-stimulating hormone) are the four key reproductive hormones which helps a woman in her pregnancy and overall well-being. Each of the hormones needs to be present in a certain amount and precisely at a point in the menstrual cycle for conception.