Pregnancy and conception
Within 3 weeks, the cells begin to grow as clumps, and the baby's first nerve cells have already formed.
Pregnancy Hormones
A pregnancy hormone known as hCG is in your blood from the time of conception. This is the hormone detected in a pregnancy test. Usually it takes 3 to 4 weeks from the first day of your last period for the levels of hCG to be high enough to be found by the tests.
In this article
Within 3 weeks, the cells begin to grow as clumps, and the baby's first nerve cells have already formed.
Pregnancy Hormones
A pregnancy hormone known as hCG is in your blood from the time of conception. This is the hormone detected in a pregnancy test. Usually it takes 3 to 4 weeks from the first day of your last period for the levels of hCG to be high enough to be found by the tests.
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