Pregnant women tests discover dating

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The first 2 are subject to considerable error and should only be used when ultrasonography facilities are not available.

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If you have a negative result, but still don’t get your period, test again in three days’ time.

The sensitivity of a pregnancy test is described on the packaging as m IU/ml (milli-international unit per millilitre).

In general, pregnancy tests range in sensitivity from 10m IU/ml to 40 ml U/ml.

Home pregnancy tests are marketed to women as a tool to use to see if they are pregnant, said Michele Helgeson, a certified nurse midwife and director of midwifery at Brigham and Women's Hospital in Boston.

If positive results are obtained, it can be a springboard to seek out medical attention from their health provider for early prenatal care, she said.

In rare cases, the date of coitus is known, and this may be useful in calculating the length of pregnancy.

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