contraceptions

• progestin subdermal implant is the most effective contraceptive method with a >99% efficacy rate.

  • Lasts 3 years
  • more effective than IUD and sterilization
  • causes mucus thickening, decreased tubal motility, suppresses ovulation
  • SE: unscheduled bleed, weight gain, headache
  • Contraindication: progesterone receptor+ breast cancer
  • After removal: fertility returns within a month

phenytoin toxicity can cause failure in contraception with OCP by enhancing the metabolism of oral contraceptive pills through the induction of hepatic enzymes.