After 20: An ultrasound after 20 weeks can generally determine the sex of the baby with high degree of certainty.
Answered 2/10/2012
6.1k views
Depends: Some ultrasound technicians can spot features around 16 weeks but few are ready to call it until a few weeks later.There is an interesting maternal blood test that can examine fetal cell chromosomes and determine gender (or paternity) in the first trimester.It is a bit pricey.
Answered 10/6/2015
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