This content explains the purpose and mechanism of action of emergency contraceptive tablets These tablets are intended for use in emergency situations such as unprotected sex or contraceptive failure to prevent unwanted pregnancy It is important to take the pill within 2472 hours after unprotected sex and to take it orally The effectiveness of the pill decreases over time so it is recommended to take it as soon as possible Most emergency contraceptive pills are advised to be taken within 72 hours The active ingredient in this tablet is levonorgestrel This compound works by blocking the formation of hormones like luteinizing hormone LH and folliclestimulating hormone FSH in the bloodstream These hormones are responsible for the development and release of eggs from the ovaries ovulation Therefore depending on the individuals reproductive cycle the emergency pill works by delaying ovulation However if the egg has already been released the tablet works by disrupting the fertilization process between the egg and sperm If fertilization has already occurred the tablet prevents pregnancy by hindering the implantation process in the uterus It is important to note that the morningafter pill is not a primary form of birth control and should only be used in emergencies It should not be mistaken for pills used to induce abortion