U.S. doctors online nowAsk doctors free
Atlanta, GA
A 34-year-old male asked:

Baby's head growth is 2 weeks behind the rest of the body (week 32 of pregnancy). what's the number of weeks threshold for a risk of microcephaly? is it 6 to 10 weeks behind or should we consider two weeks behind as a an indication to microcephaly ?

1 doctor answer2 doctors weighed in
Dr. Rebecca Gliksman
Internal Medicine 40 years experience
Microcephaly: What percentile? Has growth relatively slowed? Can large body -90% of average and relatively small head -20% of average, but still be normal( my child-engineer) . Microcephaly is usually defined at birth, though with ultrasound you may see in 3rd trimester(imperfect) . It is head circumference 2 standard deviations below the mean, i.e <3% of newborn have a head that small. f/u/ w neonatologist
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Jun 3, 2019


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.