Sign-in to Ask A Doctor - 24x7
OR
Sign in with Google
How To Determine The Date Of Conception?
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?
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.
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
So you don't believe it was the 31rst?!?
Brief Answer:
No,
Detailed Answer:
Less likely to be so.
Regards.
No,
Detailed Answer:
Less likely to be so.
Regards.
Above answer was peer-reviewed by :
Dr. Yogesh D
Answered by
Get personalised answers from verified doctor in minutes across 80+ specialties
