Ultrasound: It is counted from the first day of the last period. If you discuss the matter with your OB s/he may help further by an ultrasound examination. Predicting due date has normally an error margin of two weeks on either side.
Answered 6/23/2015
3.9k views
8 doctors weighed in across 2 answers
9 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question