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How To Calculate The Date Of Conception Based On Menstrual Cycle?
Question: sex with two men 1 was a 1 night stand late in the month . 2 weeks apart pregnant now. EDD 10/5 . who is likely the father? Please help im so ashamed.
Brief Answer:
Probable date of conception is 12 January 2014
Detailed Answer:
Hi XXXXXX,
Thanks for writing in to us.
I have read through your query in detail.
Based on your due date of October 5 2014, the probable date of conception is most likely January 12 2014. This date however is further based on calculations of regular 28 day cycles and may differ if your cycles are not 28 days in duration. You may like to discuss further keeping in mind the dates on which you had sex. For a more accurate probable date of conception, your LMP date may be used in calculation.
Its difficult to say who is the father of a baby if the mother has conceived after having sex with two men within 10 days apart.
Hope your query is answered.
Do write back if you have any further doubts.
Regards,
Dr.Vivek
Probable date of conception is 12 January 2014
Detailed Answer:
Hi XXXXXX,
Thanks for writing in to us.
I have read through your query in detail.
Based on your due date of October 5 2014, the probable date of conception is most likely January 12 2014. This date however is further based on calculations of regular 28 day cycles and may differ if your cycles are not 28 days in duration. You may like to discuss further keeping in mind the dates on which you had sex. For a more accurate probable date of conception, your LMP date may be used in calculation.
Its difficult to say who is the father of a baby if the mother has conceived after having sex with two men within 10 days apart.
Hope your query is answered.
Do write back if you have any further doubts.
Regards,
Dr.Vivek
Above answer was peer-reviewed by :
Dr. Yogesh D
I had sex with guy number 1 all around my ovulation time. then had a 1 night stand on the 22nd . my lmp was 12/29 . is it possible my lmp and ultrasound be off by more than a week?
Brief Answer:
Most likely father is guy number 1
Detailed Answer:
Hi XXXXX,
Thanks for writing back with the LMP date.
Supposing LMP was on 29 December 2013, then the most fertile period is from 8 January 2014 to 18 January 2014. With this information, it is most likely that the father of the baby is guy number 1. The reason is that when you had the one night stand on 22 January 2014, you were less likely to be fertile.
There exists possibilities of ultrasound and LMP dates to be off by more than a week but while assessing the dates the first ultrasound dates are found to be most accurate. Subsequent ultrasound dates especially near term may differ by more than a week.
Hope your query is answered.
Do write back if you have any further doubts.
Regards,
Dr.Vivek
Most likely father is guy number 1
Detailed Answer:
Hi XXXXX,
Thanks for writing back with the LMP date.
Supposing LMP was on 29 December 2013, then the most fertile period is from 8 January 2014 to 18 January 2014. With this information, it is most likely that the father of the baby is guy number 1. The reason is that when you had the one night stand on 22 January 2014, you were less likely to be fertile.
There exists possibilities of ultrasound and LMP dates to be off by more than a week but while assessing the dates the first ultrasound dates are found to be most accurate. Subsequent ultrasound dates especially near term may differ by more than a week.
Hope your query is answered.
Do write back if you have any further doubts.
Regards,
Dr.Vivek
Above answer was peer-reviewed by :
Dr. Chakravarthy Mazumdar
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