A 30-year-old male asked:
My nurse said opk can detect hcg in the system after the trigger. does this also mean opk can detect pregnancy on the day period is due.
1 doctor answer • 5 doctors weighed in
Fertility Medicine 21 years experience
Cross reaction: An OPK is meant to detect the hormone lh which surges at the time of ovulation. A urine pregnancy test is meant to detect hcg, the hormone of pregnancy. However, both HCG and lh are very close relatives chemically and that's why the OPK can pick up a pregnancy and the urine pregnancy test can pick up an ovulation surge. You should still use each test for its specific purpose.
5k viewsReviewed >2 years ago
Last updated Feb 13, 2015
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $39!
50% off with $15/month membership
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.