
Can Home Ovulation Kit Show Inaccurate Result If Someone Is Already Pregnant?

Thanks for writing to us.
Home ovulation kits can predict ovulation only around 24-36 hours prior to ovulation as they detect the LH surge that occurs just before ovulation. If you happen to have had an unprotected intercourse before this period, the chances of conception exist, which cannot be detected by the test.
Another simple way to detect ovulation and conception at the earliest is by measurement of the pregnancy.
A home pregnancy test is best taken about 3-5 days after the missed period, with a fresh early morning sample of urine. As you say, your previous pregnancies could not be detected at an early stage, the best way would be to go for a serum beta-hCG test which can confirm pregnancy even with a single measurement(if ambiguous, serial titres may be needed). Sometimes, in very early pregnancy, hormonal titres do not significantly rise so as to show in the routine tests; in such a situation repeated testing may be needed.
I hope I have clarified your query. Please feel free to ask if you need further clarifications. I will be happy to help.
regards,
Shanti.V.

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