20 weeks 1 day ago: The standard way of counting pregnancy weeks is from the beginning of the last menstrual period, and presumes a 28-day menstrual cycle. That means the pregnancy weeks officially start 2 weeks before ovulation and conception. Thus a person who is 22 weeks pregnant is presumed to have conceived 20 weeks ago. In natural pregnancies, all dates are estimates, plus or minus one week.
Answered 4/10/2017
740 views
8 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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