The following is NOT a way in which the hormone method of birth control prevents pregnancy: A. The hormone method of birth control does not cause ovaries to release extra eggs. All other options are true. Hormone method of birth control prevents ovulation to occur, which is the same at: it prevents ovaries from releasing eggs . They also change the cervical mucus to hinder sperm from moving into the uterus (C. thickens mucus and D. thins lining of uterus).