How effective are ECPs?

• The following are some example statistics for women having unprotected intercourse in second or third week of their menstrual cycle:
  • No ECP treatment - 8 out of 100 women will get pregnant
  • ECP Treatment 72-120 hours after intercourse - 3-4 out of 100 women will get pregnant
  • ECP Treatment within 72 hours after intercourse - 1-2 out of 100 women will get pregnant.