Delyla, generic name levonorgestrel and ethinyl estradiol, belongs to a group of drugs known as Contraceptives. This combination hormone is used to prevent pregnancy. The drug basically contains two hormones which are; Progestin and Estrogen. Delyla medication works by preventing the release of the egg during the ovulation period of the menstrual cycle in women. The medication also makes the virginal fluid thicker to help prevent the sperm from reaching the egg.