Inhibin-B is a hormone that is secreted by specific cells in the ovary. Regrettably these hormones may sometimes be an indication of Ovarian Cancer or an underdeveloped foetus. In actuality, the hormone usually regulates menstrual cycles and enables the development of the foetus during pregnancy. However, the Inhibin-B Blood Test is carried out to figure the levels of this hormone in the blood. It helps in detecting how well is the ovary reserve of women as a measure of their chances to get pregnant. If the woman is already pregnant, it helps to detect aberrations during pregnancy including Ovarian Cancer