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A member asked:
Do ultrasounds date 2 weeks ahead too or is that just going by lmp?
3 doctors weighed in across 2 answers
It depends.: Pregnancy calculations and "Menstrual Math" as a friend of mine calls it, can be confusing. Universally, dating a pregnancy hinges off the LMP or an early ultrasound and uses 40 weeks as the total length of pregnancy. Counting from the first day of your LMP, this calculation includes 2 weeks where you actually weren't pregnant.
Answered 12/20/2014
3.8k views
Pregnancy: Ultrasound measures precisely the size of the fetus or embryo therefore giving very close number for your gestational dates,\.
Answered 8/3/2014
3.8k views
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