Depends: It can be suspected during prenatal screening with either blood test or diagnostic ultrasound. It can be confirmed by chromosomal analysis from fluid obtained from the womb by amniocentesis or cells taken by cvs. An observant physician can often tell during the infants first exam.
Answered 5/5/2013
5.1k views
7 doctors weighed in across 3 answers
4 doctors weighed in across 3 answers
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