How effective is the morning after pill?
If you are not ovulating and you take EllaOne within the 120-hour window, your chance of not getting pregnant is 98-99%. For Levonelle, if you are not ovulating and take it within 72 hours then you have a 97-99% chance of not getting pregnant.
Levonelle is not recommended if you are close to ovulation. If this is the case EllaOne is a better choice of oral emergency contraceptive pill. However, neither type of emergency contraception will work after ovulation has begun.
Levonelle does not make the contraceptive pill any less effective. So just keep taking your pill as normal and use an alternative form of protection until your regular contraceptive pill protects you again (usually seven days from the point after you skipped a pill and restarted taking it).
EllaOne can make the contraceptive pill less effective. As a result, you must use some other form of contraception for 7 days after using EllaOne to ensure you are protected from pregnancy. These can include barrier methods like condoms or the contraceptive diaphragm.
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