Some women experience signs or symptoms of pregnancy within a week of conception. For other women, pregnancy symptoms may develop over a few weeks or may not be present at all. In this case, we recommend waiting to take a pregnancy test until your period is late.
When the sperm penetrates an egg during conception, your body produces a hormone called human chorionic gonadotropin (hCG). Urine-based pregnancy tests detect the presence of hCG in your body which is an indication of a possible pregnancy.
Emergency Contraceptive Pills (ECPs) are often called the “morning after pill.” In the United States, there are two kinds of ECPs. One is called Plan B One-Step. The other is called Next Choice. ECP should prevent pregnancy from occurring, but must be used soon after unprotected intercourse to be effective. If you are already pregnant, none of the Emergency contraceptive pills have been shown to harm the health of the fetus. If you have not had your period within a week of expecting it, you should take a pregnancy test.
According to WomensHealth.gov after you have taken ECPs, your next period may come sooner or later than normal. Most women will get their period within 7 days of the expected date. Your period also may be heavier, lighter, or more spotty than normal. If you do not get your period in 3 weeks or if you think you might be pregnant after taking ECPs, take a pregnancy test.