U.S. doctors online nowAsk doctors free
Canada
A 33-year-old female asked:

How big does fetus have to be - mm/cm - in order for the nt scan to be performed. is it a must that it be of a certain size?

1 doctor answer2 doctors weighed in
Dr. Michael Fisher
Dermatology 32 years experience
Detection of a Fetus: The earliest that a fetus can be seen is four to five weeks into the pregnancy, when it is possible to see the gestational sac. This structure is the first that doctors can look at on an ultrasound to determine whether a woman is pregnant, and it can be seen before the actual embryo can.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

Similar questions

Canada
A 33-year-old female asked:

How big does the fetus have to be - mm/cm - in order to have the NT scan performed?

1 doctor answer2 doctors weighed in
Dr. Jeff Livingston
Obstetrics and Gynecology 22 years experience
Weeks : One does that test based on gestational age not size. It's done between 11-13 6/7 weeks.
Dr. Roger Duvivier
Obstetrics and Gynecology 47 years experience
If your menstrual cycles are regular and you are sure of your LNMP, your gestational menstrual age can guide the optimal time to have the NT scan otherwise consult a certified obstetrical sonographer or an MFM doctor who is skilled in first trimester sonography
Jan 10, 2015

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated Jan 4, 2014

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.