Mechanism of Action of Oral Contraceptive Pills

Mechanism of Action of Oral Contraceptive Pills
Females willing to prevent conception are administered with small doses of progesterone or progesterone-estrogen combinations. These pills are consumed daily for 21 days, starting from preferably first five days of menstrual cycle. They act as contraceptive by doing the following:

  1. Inhibit ovulation
  2. Thicken the cervical mucus to prevent entry of sperms
  3. Delay transport of sperms or egg
  4. Inhibit implantation of embryo in the uterus
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