Re: 15mm amniotic sac measurement margin of error?

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At Mon, 21 Jan 2002, Carla wrote: >
>Since 15mm amniotic sac corresponds to 5wks5days pregnant then what is
>the +\- margin of error with this in days. When a woman has a 28 day
>cycle it states that you count the first day as day one and on the 14th
>day is when you should ovulate...well I was wondering if when figuring
>out ultrasound dating if you count the day to which the ultrasound dates
>to as day one in the same way, (+\- margin of error) because then
>5wks5days would be 3wks4days since conception and not 3wks5days if you
>simply just add 14 days and not count the first day as day one, correct?
>yikes...hope you get this.

--
James Wang, M.D
Assitant Clinical Prof.
Tufts University School of Medicine

statements are informational only and should not constitute a medical plan or treatment recommendation.

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