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Re: 'exactly' when does 1st trimester end - 12weeks 0days or 12weeks 6days ? (more)

From: anonymous@obgyn.net
Tue, 12 Nov 2002 12:31:33 -0600 (CST)


At Tue, 12 Nov 2002, ambika wrote: >
>i read on the net that each trimester is 13 weeks and 2 days to be very
>precise, then why do we say that the first trimester lasts 12 or 12+
>weeks? many thanks!

Pregnancy lasts 40 weeks (9 months and one week; average). That means that the first trimester will end at 13 ws + 2 days.

--
Fabio Fiorino, M.D.



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