SOURCES Williams Obstetrics 21st Edition.
Cunningham et al. Up To Date: Prenatal Assessment of Gestational Age.
This tool does not provide medical advice.
See Additional Information
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.