Estimating Gestational Age

[ericdamiansean]

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Hey guys, anyone knows any quick formula on how to estimate gestational age based on the current date and the last menstrual period?

I've seen many consultants do it within seconds, they said that it comes with experience, but there must be some formula like Nagele's rule.

 

[fantasty]

Is that what's on a pregnancy wheel? I haven't had ob-gyn yet, but people on here (and in First Aid) mentioned that it's a good tool to carry with you on OB... I don't know if this one is good but found it with some searching...

http://www.fetalmedicine.ac.uk/gw/html/wheel.html

 

[ericdamiansean]

I wish I could..come from a school of hard knocks, we're supposed to know these without referring

 

[chrisisinnocent]

To get due date: from LMP add one year substract three month and add 7 days

 

[Wrigleyville]

Uh, nagele's rule IS the quick calculation. I think everyone can subtract 3 months and add 7 days in their head.

 

[fuzzyerin]

If you're talking about knowing that someone is 35 and 1/7 weeks today based on the LMP or EDD by just looking at the dates, you get used to this over years when you see, for example, a bunch of people due in early Feb every year at the end of December...

 

[tr]

Yeah, just get a pregnancy wheel. They were floating around all over the place on our Ob rotation; check the cabinets. Otherwise, ask a resident where you can get your own.

 

[ericdamiansean]

Thanks guys..
But I don't think that I'll be lugging one around😀