pregnancy tests

By Anonymous December 13, 2013 - 5:30pm

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I have a couple questions about the specifics of at home pregnancy tests- the first response test talks about detecting pregnancy if you take it on the first day of your period. how does it base its results? what if you dont know the exact first day of your period, would it still detect a pregnancy?

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Maryann Gromisch RN Guide

Hello Anonymous,

A pregnancy test detects hCG levels.Human chorionic gonadotropin,hCG, is a hormone that is produced by the cells that form the placenta. Thus, it is only produced during pregnancy.

Levels of hCG can be detected in urine about 12 to 14 days following conception and in blood about 11 days following conception. The levels will double every 72 hours and reach peak in the first eight to 11 weeks of pregnancy.

In general, it is a good idea to wait until your period is late by at least one week. Use the first urine of the morning to test because the urine is the most concentrated at this time.

The first day of your period is the day that you start bleeding.

Does this answer your questions?
Maryann

December 13, 2013 - 6:13pm