How do ORTHO TRI-CYCLEN and ORTHO-CYCLEN work?
Birth control pills, including ORTHO TRI-CYCLEN and ORTHO-CYCLEN, work by preventing ovulation, which means your egg is not released and, therefore, can’t be fertilized by sperm. The pill also causes your cervical mucus to become thick, making it difficult for sperm to enter your uterus. You can feel very confident that your pill is working to prevent pregnancy.