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Your hunch is right; the ultrasound date is based on the day your last period ended. So, on average, the 40 week pregnancy begins two weeks before conception has even occured.

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15y ago

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If you went to the doctor on February 1 and you were two weeks pregnant when did conception start?

As pregnancy is counted from the beginning of your period, 2 weeks is actually when you conceive. So you conceived on February 1st.


When did you conceive if the due date is 11th September?

You would have conceived some time in December... You can work out when your period was that will give you some clue to when you conceived


When did you become pregnant if the first day of your last period was Nov. 4th and you conceived on Nov. 17th?

If you conceived on the 17th that's when you became pregnant.


Do women have to start their period to get pregnant?

to conceive is to become pregnant . So the answer to your question is, Yes !


Can a girl get pregnant when they have their period?

yes a girl can get pregnant when she has her period...thats how majority of persons who cannot conceive succeed by having sex on their "day" .


Your last period was June 102008 you are pregnant when did you conceive?

Roughly June 24th


Is my due date different if I conceived while on my period?

It is extremely unusual to conceive during a period, but you may need an ultrasound scan to confirm your due date.


What if your ultrasound said 5 weeks when did you conceive?

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.


If you have polycystic ovaries can you miss a period if you conceived just before it's due?

All women will miss a period if they conceive just before the period is due. That phenomenon is not specific to women with polycystic ovaries.


Can you get pregnant 25 days after period start?

Yes you can :) I got pregnant 25 days after the start of my period. My period began on March 13th and I conceived on April 7th....and not a day before 4/7


If your scan showed you were 6 weeks pregnant when did you conceive?

The statement that you are six weeks pregnant means that you have been pregnant for six weeks, hence, you conceived six weeks ago. Bear in mind that these are estimates, they are not necessarily accurate down to the exact day. But they are reasonably good estimates.


I just found out I'm pregnant but I don't think I should go by my last period because I know I didn't conceive then what do I do?

Pregnancy is counted by LMP for doctors convenience. Your baby was conceived when you ovulated about 2 weeks later. Don't worry the baby will be born when she is ready.