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Fetal Period Begins


9 weeks

From The Biology of Prenatal Development.Buy Now

Script: მე-9 კვირა

ნაყოფობის პერიოდი გრძელდება დაბადებამდე.

All ages referenced to fertilization, not last menstrual period.
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2 Comments


Maggie Fanelli
November 26, 2010 at 1:50 am
Maggie Fanelli
So by \"9 weeks\" do they mean 9 menstrual weeks or 9 weeks since conception (11-12 menstrual weeks)?
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EHD
December 29, 2010 at 8:04 pm
EHD
All embryonic and fetal ages are referenced to the time of fertilization (or conception) The age of this 9-week fetus corresponds to 11 weeks from the start of the last menstrual, period.
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