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Pregnancy Timeline: Calculating Conception Date from Birth Date


Question
QUESTION: if you had a baby on January 31,2008 what month did you get pregnant in??

ANSWER: It would have been April or May of 2007.  I can't be more precise than that, because normal human gestation ranges from 37 to 42 weeks, giving a five week window of possible conception dates for any particular birth date.

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QUESTION: ok so do april 30 count as May they say coneption took place may 5 so more likely it was april right

Answer
Where are you hearing a conception date of May 5 from?  Was this determined by an early ultrasound?  In the absence of specific charting data from the mother, or an early dating ultrasound, the closest date range you can get is April 26 to May 31.  If an early ultrasound provided a conception date of May 5, the date range would still be somewhere between April 30 and May 10, because the ultrasound has a margin of error of 3-5 days.  If the mother provided a date of May 5 by charting her ovulation, that provides a conception range of May 1 to May 6, because any intercourse within that range could have resulted in pregnancy.