Emergency contraceptive

Question: If I ate emergency contraceptive, how do I know whether pregnant or not?

Answer: Emergency contraceptive pills are quite effective in preventing pregnancy, it produces endometrial changes unsuitable for implantation of fertilized egg. But it cannot prevent pregnancy 100%. So if menstruation errors more than predicted, may suspect pregnancy (however, the emergency contraceptive may cause menstruation period too late or maybe faster than expected about 1 week.

In addition, pregnant women may have early symptoms, these include fatigue, frequent urination. And at about 6 weeks of pregnancy may have nausea and vomiting.

So, it is recommended that you should be tested for pregnancy, if menstruation has error more than predicted.

References:

1. Armstrong C. ACOG recommendations on emergency contraception. Am Fam Physician 2010; 15: 1278.
2. Dipiro JT, Talbert RL, Yee GC, editors. Pharmacotherapy A pathophysiologic approach. 8ht ed. New York: McGraw-Hill; 2011.