Sometime around 19th January
31st March or thereabouts
Around Jan1st
around march 21 but no one can be 100% certain
i had an ultrasound when i was 6 weeks pregnant, but by ultrasound, the pregnancy measured to be 5 weeks, so no fetal pole was seen yet. i think the earliest fetal poles can be seen is about 6 1/2 - 7 weeks. hope this helps :)
Somewhere between 3rd and 9th December 2005.
Subtract fourteen weeks (7 days x 14) from the date of the ultrasound.
Fetal heartbeat
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.
An ultrasound at 6 weeks should show a fetal heartbeat, if there was a fetal heartbeat you're not miscarrying.. It's probable you estimated your due date wrong.
May
never
About 3 months, usually respiratory system of the baby develops at 12 weeks of age. ** The fetus's heart starts beating at five weeks gestation. Through an ultrasound you can see the ultrasound at about 6-7 weeks. With a fetal Doppler you can hear the heart beat at about 9 weeks.