http://www.aafp.org/afp/2000/1015/p1835.html
You must not take isotretinoin if you are pregnant or if there is any chance you might get pregnant while taking this medicine!
Isotretinoin causes severe birth defects, including malformation of the head and face, mental retardation and severe internal defects of the brain, heart, glands and nervous system. It can also cause miscarriage, premature birth and death of the fetus.
You must use two forms of birth control at the same time for at least one month before you start taking isotretinoin and for all the time you are taking this medicine. Keep using two kinds of birth control for one month after you stop taking isotretinoin. If you are using Depo-Provera as your form of birth control, you may not need to use two forms of birth control. Check this with your doctor.
Your doctor will make sure you are not pregnant before starting isotretinoin and check again every month while you are taking it. You will be asked to read and sign a consent form to show that you understand the dangers of birth defects and agree to use birth control. If your period is late, stop taking isotretinoin and call your doctor right away. If you get pregnant while you are taking isotretinoin, talk with your doctor about going on with the pregnancy.
I read the last line as "if you accidentally get pregnant while taking this stuff, seriously consider an abortion."
This is tretinoin, the topical form. It is very mild. If you live in a country where this is prescription-only, a doctor will probably prescribe it to you if you visit them for mild acne. Isotretinoin (Accutane) requires a specially licensed dermatologist to prescribe.
I have been using this for years (originally prescribed by doctor) and it works great. Just be sure to put on sun screen if you use it and are going outside for extended periods of time-it makes your skin sensetive.