If my obgyn says that my due date is
10/15/08 by the u/s when can be the date I
had sex that caused the pregnancy? My LMP
was 1/5/08 and my next period is usually
31-32 days and sometimes it's
irregualr.
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DoctorAnswer
Doctor Answer
Joined: 19 Dec 2005 Posts: 16777211
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Pregnancy Answer A4433 Posted: 07-21-08 22:13pm
Ultrasound apparatus calculates the
pregnancy age not according to your LMP
but according to certain dimensions of the
fetus. In your case, the calendar due date
and ultrasound due date are separated by
only 3 days so I can assume that you
conceived somewhere between 20th and 30th
of January, 2008.
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