A member asked:

My friend said they were able to tell her baby's gender through blood work. how does this work? and how for along do you need to be?

A doctor has provided 1 answer

6-10 weeks: Fetal DNA circulates in the mother's blood and can be analyzed to determine the sex of the baby as well as tested for some diseases. Please review this article and discuss the matter with your obstetrician. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3558193/

Answered 11/6/2016

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