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Avatar universal

estimated due date

The problem is i slept with someone on the 20th of January and  had a regular period on the 25th of January 2013.

I then slept with someone else on the 7,8,9,10 of February. then did a pregnancy test at the end of February which was positive.

I went for an ultrasound on the 23th April 2013 and the gestational age of my baby was 13 weeks 2 days.

On the 13 June, i had another scan and the baby measured BPD =49.7, HC=170.4 and Ac= 147.2

Can someone pls help calculate when conception was likely and the accuracy of the ultrasound. I have been given a due date of 27th of October.


thanks
Best Answer
134578 tn?1614729226
COMMUNITY LEADER
That far along in your pregnancy, it could be a few days off one direction or another, but in general it gives you the following:

Probable date of ovulation:  February 3 - 8
Possible dates of conception:  January 30 to February 12

It sounds like the January 20 guy, who is already separated by a period from the next guy, is out anyway because that is too far before your estimated due date gives you as a conception window.
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5496415 tn?1373500207
So you usually go 40 weeks from conception to get your due date.. so I think its jan. 20th. But that's just what I think!
Helpful - 0
889551 tn?1416184483
You usually ovulate 2 weeks before your lmp.  So your edd puts your lmp at January 20th, meaning you ovulated sometime around February 7th or 8th.
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Avatar universal
I conceived on the 16th of Jan, (i had ivf). My due date is october 9th, so you are due about 3 weeks after me so you would have concieved 3 weeks aftet me around the beginning of February. So i would guess the second one, plus u had a period between them. Hope this helps! Congrats and Good Luck!
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Avatar universal
It's the first one. You conceived at the beginning if Feb. Meaning you was already pregnant before the 7th.
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Avatar universal
Plz keep us updated
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Avatar universal

How many weeks pregnant will you be today?
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Avatar universal
Hi Annie

Please whats the difference in

Probable date of ovulation:  February 3 - 8
Possible dates of conception:  January 30 to February 12

I thought its meant to be the same?
Helpful - 0
134578 tn?1614729226
COMMUNITY LEADER
When you ovulate, your egg only survives 24-36 hours before it is no longer viable.  But when you have unprotected sex, the guy's sperm lives 5 or 6 days after that, in your reproductive tract.  

Conception calculators give you a probable date of your ovulation, but a window also, in case you ovulated a little early in relation to your last period, or in case you had sex on a certain date but you actually conceived a few days later because the sperm was still in your system.  

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