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Q: Caculate your conception date
asked by: DoctorQuestion on January 11th, 2007
Doctor Question
I confused as to what day I might have conceived I just need a little help if you can........I had sex on july 14th n then got my period on the 17th n had it regular like I do every month n I always get it every month on time......then I had sex on July 24th n then july 28th 29th 30th 31st n aug 1st.......the doctor says that it prob happened on the 31st or 1st by goin by my LMP and by the ultrasound my due date is matching up with everything which is april 23rd which will make the conceieving date july 31st but their not that accurate what do u think....thank you for taking your time out to listen I just need to know this
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DoctorAnswer replied on January 22nd, 2007
Doctor Answer
Pregnancy Answer A2148
The age of a pregnancy age is counted from the first day of the last menstruation and not from the day of conception. The baby's due date is also calculated from the first day of the last menstrual period (LMP)... not from the day of conception (LMP - 3months + 7days = due date). For women with a 28 day cycle (most cases), conception occurs about 2 weeks after the first day of the last menstruation. If your cycle lasts 28 days and your last menstruation started on the 17th of July, you probably conceived around the 1st of August.


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