Some morning after pills contain a hormone known as the levonorgestrel whereas, others contain two hormones, namely estrogen and progesterone. The morning after pill is a form of emergency birth control measure to be taken within 72 hours of having unprotected sex to avoid pregnancy. It irritates the lining of the uterus (endometrium) and thereby, stops the implantation of the egg. The morning after pill also alters the normal functioning of the menstrual cycle, thereby delaying the ovulation process and stops pregnancy.

Estrogen on the other hand, intercepts the ovaries from releasing eggs (ovulation), thus stops pregnancy. It limits the range of ovulation process, i.e. The emergency contraceptive morning after pill has three modes of action and it functions similar to a birth control pill. Its course of action is divided into three steps. The active components in the morning after pills are similar to those found in a birth control pill.

These pills are generally regarded as one of the safest modes to stop pregnancy. It prevents the ovaries from releasing an egg, which in turn prevents the fertilization process and pregnancy. Hence, it is very essential for you to be aware of the facts about morning after pills.

Progesterone prevents the sperm from reaching the egg (implantation), thereby stops pregnancy.