Q: Is it possible to receive a false positive?
A: Yes. Certain fertility medications with hCG (Novarel, Profasi, Pregnyl, Humegon™, APL) and certain rare medical conditions can result in a false positive result.
Using the test within 8 weeks of giving birth or having a miscarriage may also cause a false positive result. The test may detect hCG still in your system from a previous pregnancy You should ask your doctor for help in interpreting the result of your test if you have recently been pregnant.
Factors which should NOT affect the test result include alcohol, analgesics (pain killers), antibiotics, birth control pills or hormone therapies containing clomiphene citrate (Clomid or Serophen).
Q: Can I be pregnant and not get a positive HPT?
A: Yes. Most women will register on HPTs by the time they are a few days late for a period, but not everyone will. Factors that may result in a false negative are:
Q: Do oral contraceptives/birth control pills interfere with home pregnancy test results?
A: No. The hormones in the pill don't cause a false positive or a false negative result.
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