Normal ovaries in neonates and infants: a sonographic study of 77 patients 1 day to 24 months old.

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Abstract
Normal values for ovarian measurements in adults have been revised over the past decade. A recent report stated that ovarian cysts were common in healthy girls 2-13 years old, refuting the findings of a 1984 study. No large sonographic study of normal ovaries in girls 1 day to 24 months old has been performed. We evaluated ovaries in girls in this age group to determine the normal volume and prevalence of ovarian cysts.The ovaries of 77 consecutive patients 1 day to 24 months old were evaluated during routine pelvic sonography. Patients were divided into three age groups: 1 day to 3 months old (when gonadotropin levels are highest because of loss of placental hormonal influence), 4-12 months old (an intermediate group), and 13-24 months old (when gonadotropin levels are low).Ninety-eight ovaries were imaged in three dimensions. The mean volume was 1.06 cm3 (range, 0.7-3.6 cm3) among girls up to 3 months old; 1.05 cm3 (range, 0.2-2.7 cm3) among girls 4-12 months old; and 0.67 cm3 (range, 0.1-1.7 cm3) among...

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