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How To Determine The Conception Date?

Posted on Wed, 28 Dec 2016

Question: If my due date was February 4th 2017 when did I conceive ? I have two possible baby daddy's the first guy I last slept with April 24th 2016 and the second May 12th and as of Dec 2nd of this month I was 30 weeks and 6 days pregnant . Which guy is more likely to be the baby's father ?

Answered by Dr. Dalia Muraleedharan (47 minutes later)

Brief Answer:
Hi..

Detailed Answer:
Hi..
Thanks for writing..
I understand your concern..

Since the date of delivery is 4/2/2017, the likely date of your last periods is 27/4/16.. This means your ovulation might have occured 2weeks later that is around 11th may 2016.. Since you had intercourse on May 12th, the 2nd guy is most likely to be the father..

Can you sent me the first scan report available to know the exact date of conception.. Do you know when was your last period date.?

Looking forward for your reply.. Good day..

Above answer was peer-reviewed by : Dr. Remy Koshy

Follow up: Dr. Dalia Muraleedharan (3 hours later)

According to another OB figuring out date of conception is simple with a due date because all you need to do is subtract 266 days from conception date . We have talked before and I don't remember my last period or do I have the first ultrasound I never asked for it . I only had a second ultrasound which said I was 12w and 1 day 07/08/2016.

Answered by Dr. Dalia Muraleedharan (1 hour later)

Brief Answer:
Hi

Detailed Answer:
Hi..
Thanks for writing..

Sorry I forgot the conversation we had before..
Yes you can subtract 266 days from due date to get the date of conception.. It should be around May 2nd week..

So in both cases conclusion is same..

Hope I have answered your query.. Feel free to ask any doubts.. Good day..

Above answer was peer-reviewed by : Dr. Yogesh D

Follow up: Dr. Dalia Muraleedharan (14 hours later)

Thank you for your time so I can probably conclude the second guy is most likely the father of my baby . I'll try to get my hands on my first ultrasound aswell . My due date could still be Feb 4th but I remember when I took a urine test to see if I was pregnant my due date was estimated to be Feb 18 which sounds more accurate to me .

Answered by Dr. Dalia Muraleedharan (8 minutes later)

Brief Answer:
ok

Detailed Answer:
Hi..
Thanks for writing...

You can ask any queries as required.. Good day..

Above answer was peer-reviewed by : Dr. Nagamani Ng

Follow up: Dr. Dalia Muraleedharan (21 minutes later)

If I'm 30 weeks and 9 days now according to my OB isn't that about 8 months pregnant and that would mean I have 1 month left to hit 9 . I guess I basically do because Feb is only 4 days

Why can't I just subtract 31 weeks and 9 days to figure out when I conceived why is it 266 days ?

Answered by Dr. Dalia Muraleedharan (22 hours later)

Brief Answer:
hi

Detailed Answer:
Hi..
Thanks for writing..
The total period of pregnancy is 40 weeks or 280 days from the last periods.. It is 266 days from the date of conception..

30 weeks 6 days means you have 9 more weeks left..

Any calculation using number of days or weeks gives the same result..

Hope i have answered your query.. Feel free to ask any queries.. Good day..

Note: For further follow up on related General & Family Physician Click here.

Above answer was peer-reviewed by : Dr. Remy Koshy