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U/s today & Lmp

What does it mean when your lmp and u/s today match?
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Simply that the first day of your last menstrual period agrees with the fetal size measured by the ultrasound. By convention weeks of pregnancy are counted from that day, even though the ovulation occurred two weeks later. Sex in the days leading up to the ovulation was responsible for the pregnancy.
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13167 tn?1327194124
Can you be more specific?  Are you saying your LMP began on the same day your ultrasound indicates it did?
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