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wildchild2x2

A Question About Due Date Calculators

8 years ago
last modified: 8 years ago

DD has an in-law ( a drama queen) who just shouted out her pregnancy news on Facebook. By my calculations she is only 5 weeks along and DD and I were talking about this. DD said the new calculations put her at around 7 weeks.

Could someone more in tune with the times explain to me why so many calculators count the week or even 2 before conception as the 1st or second week of the 40 week gestation cycle? To my way of thinking it starts at the average time of conception which is somewhere around the second week of a woman's cycle.

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