The morning-after pill is meant for backup contraception only.
Emergency contraception is used to prevent pregnancy after unprotected sex or if birth control method has failed e.g., condom leak.
Morning-after pills do not end a pregnancy that has implanted. It works primarily by delaying or preventing ovulation and making uterine environment hostile.
In overweight or obese, the morning-after pill won’t be as effective in preventing pregnancy.
Side effects can be:
Nausea or vomiting
Fatigue
Breast tenderness
Bleeding between periods or heavier menstrual bleeding.
Lower abdominal pain or cramps.
The morning-after pill doesn’t offer lasting protection from pregnancy. If you have unprotected sex in the days and weeks after taking the morning-after pill, you’re at risk of becoming pregnant.
If period doesn’t come within three to four weeks of taking the morning-after pill, take a pregnancy test.
For maximum effectiveness, emergency contraception should be started as soon as possible after unprotected intercourse, and within 120 hours.
If you start bleeding or spotting that lasts longer than a week or severe lower abdominal pain three to five weeks after taking the morning-after pill, contact doctor. These can indicate a miscarriage or that the fertilized egg has implanted in a fallopian tube (ectopic pregnancy).
Ectopic pregnancy is a serious complication, it destroys your one fallopian tube for good.