Q: How accurate are the home pregnancy tests that say you can get a positive result 3, 4 or 5 days earlier than other tests, or 3-4 days before you have missed a period?

A: Because implantation usually happens 6-12 days after ovulation, it is always possible that early testing will be too soon. Clearblue Easy publishes on its website the following stats: “Clearblue Easy can be used as early at 4 days before you expect your period. That's 5 days sooner than waiting until you miss your period to test. The amount of pregnancy hormone increases rapidly in early pregnancy. In clinical testing with early pregnancy samples, Clearblue Easy gave the following results. 53% of pregnant women get results 5 days sooner. 74% get results 4 days sooner. 84% get results 3 days sooner, 87% get results 2 days sooner.” With their digital test, they say 55% get a positive result 3 days before a woman’s period is due, 87% 2 days before, and 92% one day before. First Response and Answer say “Answer Quick & Simple® Early Result Pregnancy Test can detect the pregnancy hormone as early as 4 days before you expect your period. In clinical testing, Answer® detected the hormone levels in 69% of women 4 days before their expected period, in 83% of women 3 days before their expected period, in 93% of women 2 days before their expected period, and in 93% of women 1 day before their expected period.”
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* At 14 DPO, the average HCG level is 48 mIU/ml, with a typical range of 17-119 mIU/ml.

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