The morning after pill may seem like a relatively new drug, but the main ingredient in it—levonorgestrel—is the same form of progestin found in other forms of birth control, like the IUD.

Morning-after pills such as Plan B One-Step can lower a woman's chances of getting pregnant by 75-89% if taken within three days of having unprotected sex, according to Planned Parenthood.

1. The morning-after pill is made of progesterone. This is one of the hormones found in birth control pills. But, it's in a much higher dose in the morning-after pill.

The morning-after pill helps prevent pregnancy after unprotected sex, but its efficacy differs depending on the user's body mass and the timing of when they take the medication.

But anti-abortion advocates are wrong about what the morning-after pill does — as are abortion-rights proponents, the National Institutes of Health, the Mayo Clinic, and Plan B's label ...

Doctor Charis Chambers warned that levonorgestrel morning-after pills — commonly sold as Plan B — has been shown to have decreased efficacy based on both the weight and BMI (body mass index ...

6 Things You Need to Know About the Morning-After Pill Emergency contraception use is on the rise. Read up on it now to be better prepared for a crisis by Casey Gueren Published: Feb 20, 2013 5:54 ...

Consider the morning after make it or break it time. Add your morning after dealmakers and dealbreakers in the comments. The Frisky: What's The Most Ridiculous Post-Sex Request You've Ever Received?