could i have conceived two weeks later??

[mrdomino88]

i had an ultrasound on december 30th and my gestational age was determined by the doctor to be 9 weeks and 1 day. i couldnt remember when my last period was so how accurate is the ultrasound at dating a pregnancy that early with no last menstrual period to go off my due date is august 3rd and hasnt changed. i am with my current boyfriend and i just wanted to make sure its his and not my exs, he is aware that i had sex two weeks after we broke up and we just want to make sure. could i have conceived on november 21?

[kerriekab]

I'd say theres not much chance that you conceived on 21st November. Going by that dating scan they are very accurate at dating the pregnancy. Going on a normal cycle if you were 9 weeks 1 day pregnant on December 30th that would mean the you ovulated and conceived APPROXIMATELY 7 weeks and 1 day before that. My calculations put that at November 10th when the baby was conceived or around that date, between 5th -10th November i would say. If you had conceived on November 21st then this would put you at 5 weeks and 4 days. Hope this was helpful.

The only way to know for sure is to do a paternity test when the baby is born. Good luck!

[alaysha]

All babies develop at the same rate until 13 weeks. Early ultrasound dating is EXTREMELY accurate.

[rbohl01]

The u/s is the most accurate judge of your due date. They can't go wrong by taking u/s measurements. usually your last menstrual period just gives them an idea of when you are due. Nothing exact until an u.s is done. It sounds like its definitely your boyfriends =)
Good luck