How Long Does It Take to Get Pregnant After Having Sex?
Pregnancy doesn't start the moment that partners have intercourse. It can take up to six days for the sperm and egg to join and form a fertilized egg. Then, it takes six to 10 days for the fertilized egg to completely implant itself in the lining of the uterus. Pregnancy begins during implantation when the hormone needed to support pregnancy is released. That hormone is called the human chorionic gonadotropin hormone (HCG). Pregnancy tests work by detecting it.
If you're concerned about unintended pregnancy after unprotected sex, you may want to consider the morning-after pill, also known as emergency contraception (EC). EC is effective if started within 120 hours after unprotected intercourse. If started within 72 hours, EC can reduce the risk of pregnancy by 75 to 89 percent. So, the sooner you start it, the better.
Plan B One Step is a brand of EC that's available at drug stores, over the counter (without a prescription), for anyone regardless of age. Other brands like Next Choice and My Way are available without prescription for women over 17. Teens under 17 can still get these brands of EC with a prescription. The best way you can protect yourself is to get EC before an accident happens, and keep it on hand in case you need it. That way, you won't waste time after unprotected intercourse waiting to get a prescription or get to a drug store.