You should know: Human beings usually have a 40 wk gestation. So if you count backwards by 40 wks or forwards by 12 wks and subtract 1 year there you have it!
Answered 8/13/2016
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4 doctors weighed in across 2 answers
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3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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