Do the online due date calculators work?

Question

I have done mine on several sites but all of them keep telling me I am 4 weeks but I think I'm only about 2 weeks??

Answer

It counts from the first day of your last period!

Answer

It's too difficult to know exactly when you ovulated and then conceived afterwards which is why doctors base your due date & how far along you are according to your last period

Answer

Your "pregnancy clock" starts the first day of your last period, even though you don't technically get pregnant until 2 weeks later. It's easier to calculate from the last period because most women don't know the day they ovulated and conceived.

Answer

all of those are based off of "average" cycle length & luteal phase, unless you/the website know when exactly you ovulated its all just a guess

Answer

Also my last period was on Jan 28th... that was 4 weeks ago. There is no way I conceived on my period...

Do the online due date calculators work?

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