Around Jan1st
31st March or thereabouts
around march 21 but no one can be 100% certain
Somewhere between 3rd and 9th December 2005.
Subtract fourteen weeks (7 days x 14) from the date of the ultrasound.
Doctors measure pregnancy from the first day of your last period, but you don't conceive until two weeks after that. Your baby was conceived 3 weeks ago.
A pregnancy is measured from the first day of the last period. So technically 7 weeks 1 day includes the 2 weeks before you conceived. In general, you conceived 10-20 days after the first day (start of) your last period. About February 20.
May
never
march 21st 2014
99% probability it was between 10 weeks & 10 weeks and 4 days ago.
Somewhere around December 4.
32 days previously