HealthCareMagic is now Ask A Doctor - 24x7 | https://www.askadoctor24x7.com

question-icon

How To Determine The Date Of Conception?

default
Posted on Wed, 21 May 2014
Question: If I had my period on march 10th, and had unprotected sex every weekend after that,with the last encounter being march 31rst in hich he didn't orgasm and I took morning after pill 8 hrs later. Then on April 5th, I took an at home pregnancy test in which 4 of them were positive.then on April 18th, I had a dating ultrasound and it dated me at 5 weeks 4 day. What is the likelihood that it was the encounter on March 31rst in which i Got pregnant?
doctor
Answered by Dr. Aarti Abraham (14 minutes later)
Brief Answer:
ODDS LOW OF CONCEIVING ON 31ST MARCH.

Detailed Answer:
Hello
Thanks for writing to us with your health concern.

Going by your dating scan it is most likely that you conceived around the days of your ovulation after your last period on the 10th of March.
If you always had regular cycles ( let me know if this is the case), then you ovulated around the 24th of March, and conceived then.
If you had conceived on 31st of March, you would not measure 5 weeks 4 days in the dating scan.
Also you took the morning after pill and there was no ejaculate in that encounter.
Odds are very low you conceived from the encounter on 31st Of march.
A DNA paternity test would be most confirmatory.

All the best
Please feel free to discuss further.
Above answer was peer-reviewed by : Dr. Vaishalee Punj
doctor
default
Follow up: Dr. Aarti Abraham (39 minutes later)
So you don't believe it was the 31rst?!?

doctor
Answered by Dr. Aarti Abraham (14 minutes later)
Brief Answer:
No,

Detailed Answer:

Less likely to be so.

Regards.
Above answer was peer-reviewed by : Dr. Yogesh D
doctor
Answered by
Dr.
Dr. Aarti Abraham

OBGYN

Practicing since :1998

Answered : 6004 Questions

premium_optimized

The User accepted the expert's answer

Share on

Get personalised answers from verified doctor in minutes across 80+ specialties

159 Doctors Online

By proceeding, I accept the Terms and Conditions

HCM Blog Instant Access to Doctors
HCM Blog Questions Answered
HCM Blog Satisfaction
How To Determine The Date Of Conception?

Brief Answer: ODDS LOW OF CONCEIVING ON 31ST MARCH. Detailed Answer: Hello Thanks for writing to us with your health concern. Going by your dating scan it is most likely that you conceived around the days of your ovulation after your last period on the 10th of March. If you always had regular cycles ( let me know if this is the case), then you ovulated around the 24th of March, and conceived then. If you had conceived on 31st of March, you would not measure 5 weeks 4 days in the dating scan. Also you took the morning after pill and there was no ejaculate in that encounter. Odds are very low you conceived from the encounter on 31st Of march. A DNA paternity test would be most confirmatory. All the best Please feel free to discuss further.