Patient's question:
My period is delayed, and my appetite isn't good either. I can't eat much and suspect I might be pregnant. I bought early pregnancy test strips at the pharmacy. Worried that one might not be accurate, I bought two. So, I want to ask if using both test strips together could cause cross-contamination?Doctor's answer:
Ovulation test strips and early pregnancy test strips do not cross-react. Ovulation test strips are used to test luteinizing hormone in urine. Pregnant women can start testing one week after their period ends. They will show strong positive on the day of ovulation, and when they show strong positive, it is very likely to occur with same-sex pregnancy. Early pregnancy test strips usually detect whether a person is pregnant by testing the content of human chorionic gonadotropin in urine one week after the period is delayed.