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Suggest Ways To Calculate The Date Of Conception

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Posted on Wed, 16 Nov 2016
Question: Hey Doctor, I had sex with a girl on April 5,2016 and now she is 30 weeks preg from today. I used the Pull out method and I need to know the possible dates of conception. Her Ultrasound scan stated she was 8 weeks and 1 day Pregnant on XXXXXXX 2,2016 with a LMP of April 6,2016. Can you help me understand when she possibly got pregnant ?
doctor
Answered by Dr. Aarti Abraham (1 hour later)
Brief Answer:
As below

Detailed Answer:
Hello
Thanks for trusting us with your health concern.
Based on the LMP and the ultrasound scan dates, she mostly conceived 14 days after the LMP, that is , around the 20th of April, which is when probable ovulation occurred.
5th April is not likely to be the date of conception.
All the best.
Please feel free to discuss further.
Above answer was peer-reviewed by : Dr. Prasad
doctor
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Follow up: Dr. Aarti Abraham (12 minutes later)
Ok so what could be the possible due date
doctor
Answered by Dr. Aarti Abraham (4 minutes later)
Brief Answer:
As below

Detailed Answer:
Based on the LMP provided, the possible due date would be 13th of January, 2017.

Above answer was peer-reviewed by : Dr. Prasad
doctor
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Follow up: Dr. Aarti Abraham (20 minutes later)
So if she is 30 weeks today when could she have conceive and would her LMP be miscalculated
doctor
Answered by Dr. Aarti Abraham (13 hours later)
Brief Answer:
As below

Detailed Answer:
On 26th of October, she would be 29 weeks pregnant.
WHy would you say 30 weeks ?
Above answer was peer-reviewed by : Dr. REMY KOSHY
doctor
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Follow up: Dr. Aarti Abraham (6 hours later)
Well she said she is now 30 weeks pregnant and more 10 weeks to go as of yesterday. If that is true when did she conceive and what is her possible due date from there. Can her weeks of pregnancy change like that and can her due date change from the time her first Ultrasound scan was done on XXXXXXX 2, 2016. Please see the attached PHOTO of her First Ultrasound scan in the Upload New Report Section for more Details.
doctor
Answered by Dr. Aarti Abraham (1 hour later)
Brief Answer:
As below

Detailed Answer:
Based on the first ultrasound scan, she should be 29 weeks now, so she must have told you approximately 30 weeks, or maybe the latest scan showed 30 weeks.
However, the earliest ultrasound scan is the most reliable, and it clearly shows that she was 8 weeks 1 day pregnant and that corresponds to the date of LMP.
It does not matter what weeks are mentioned afterwards, you should rely only on the first ultrasound scan.
The weeks of pregnancy and the due date cannot change from the time of the first scan.
Am unable to view any scan reports in the reports section.
Please check on that.
Take care.
Above answer was peer-reviewed by : Dr. Yogesh D
doctor
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Follow up: Dr. Aarti Abraham (6 minutes later)
ok thanks. She won't give me a scan report. This is all she gave me when she thought I was the father. And I think she still believes I am. So I am just going to see the outcome. But I never had anymore sexual activities with her after April 5,2016. And I used the pull out method.
doctor
Answered by Dr. Aarti Abraham (45 minutes later)
Brief Answer:
As below

Detailed Answer:
Based on the activity on 5th April, you are not likely to be the father.
Go in for a DNA paternity test to confirm, that is the sureshot way.
Take care.
Note: Revert back with your gynae reports to get a clear medical analysis by our expert Gynecologic Oncologist. Click here.

Above answer was peer-reviewed by : Dr. Veerisetty Shyamkumar
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Answered by
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Dr. Aarti Abraham

OBGYN

Practicing since :1998

Answered : 6004 Questions

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Suggest Ways To Calculate The Date Of Conception

Brief Answer: As below Detailed Answer: Hello Thanks for trusting us with your health concern. Based on the LMP and the ultrasound scan dates, she mostly conceived 14 days after the LMP, that is , around the 20th of April, which is when probable ovulation occurred. 5th April is not likely to be the date of conception. All the best. Please feel free to discuss further.