Is taking emergency contraception effective after 72 hours?

Generally, whether taking emergency contraceptive pills after 72 hours is effective mainly depends on the timing of administration. If any discomfort occurs, it is recommended to seek medical attention promptly. The detailed analysis is as follows:

1. Effective

Emergency contraceptive pills primarily contain ingredients such as levonorgestrel or drospirenone. Their mechanism of action involves inhibiting or delaying ovulation, altering the consistency of cervical mucus, and modifying the endometrial environment to achieve contraception. Generally, taking emergency contraceptive pills within 72 hours after sexual intercourse can still provide some contraceptive effect.

2. Ineffective

If the pill is taken more than 96 hours after intercourse, the contraceptive effectiveness significantly decreases. Additionally, if ovulation or fertilization has already occurred, emergency contraceptive pills cannot prevent fertilization that has already taken place or block embryo implantation.

It is recommended to use regular contraceptive methods during sexual intercourse, such as condoms. Emergency contraceptive pills should not be used as a routine form of contraception. It's also important to keep the genital area clean and dry to avoid infections during sexual activity.