Dr. Chapa’s OBGYN Clinical Pearls
Understanding Fetal Microcephaly
Feb 05, 2026
· 29m
<p>Fetal Microcephaly has an incidence of 2 to 12 in10,000 births in the USA and can be diagnosed prenatally via ultrasound (in second or early third trimester) or postnatally via measurement of head circumference (HC). Antepartum, this is a unique diagnosis since we are mainly used to using PERCENTAGES for biometrics and for fetal weight, butmicrocephaly is not diagnosed by HC percentage- but by Standard Deviation (SD). Microcephaly has been linked to developmental delay, seizures, as well as feeding, vision …
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