Levonorgestrel is used by women to prevent pregnancy after birth control failure (such as a broken condom) or unprotected sex. It is a progestin hormone that works mainly by preventing the release of an egg (ovulation) during menstrual cycle. It also makes vaginal fluid thicker to help prevent sperm from reaching an egg (fertilization) and changes the lining of the uterus (womb) to prevent attachment of a fertilized egg. NOWILL-72 prevents unplanned pregnancy and avoid abortion.