ESPE Abstracts (2018) 89 P-P3-397

Head Circumference, Birth Length, and Weight of Neonates of Mothers with Hypothyroidism

Tamar Laron-Keneta, Aviva Silbergeldb, Pearl Lilosb & Zvi Laronb,c


aSheba Medical Center, Ramat Gan, Israel; bSchneider Children’s Medical Center, Petah Tikva, Israel; cTel Aviv University, Tel Aviv, Israel


Background: The number of publication on head size of newborns of hypothyroid mothers is scant.

Aim: To study concomitantly head circumference, birth length and weight in such neonates.

Method: Data was retrieved from computerized medical records of our hospital.

Results: One hundred and thirty nine neonates (82 males and 57 females) from a total of 18,538 deliveries at the Rabin Medical Center during the years 1987–1993 were studied. The female neonates had a significantly smaller head circumference than the males 34.3±1.4 vs 33.8±1.5 cm (P0.047) and that neonates of both genders had a tendency to a smaller head circumference than the control population. The birth length and weight were similar to the controls.

Conclusion: The head circumstance (brain size) in neonates of hypothyroid mother tends to be smaller than of healthy mothers. Whether this is due to inadequate treatment remains to be established.

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