U.S. doctors online nowAsk doctors free
OR
A female asked:

How accurate are 6 week ultrasounds and why do some babies come 2 weeks early if ultrasounds are accurate?

1 doctor answer1 doctor weighed in
Dr. Clarene Cress
Specializes in Pediatrics
Fairly accurate: Onset of labor and delivery depends on multiple factors, mostly maternal, and estimates are that 10% of infants are born earlier than 37 weeks. Age of mother, prenatal care, size and number of babies, uterine shape, maternal smoking or drugs, previous cervical cone biopsy and maternal infection are the most common.

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

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 5, 2015

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.