胎儿脑室心房：大小存在性别差异。
Fetal cerebral ventricular atrium: difference in size according to sex.
作者信息
Patel M D, Goldstein R B, Tung S, Filly R A
机构信息
Department of Radiology, San Francisco General Hospital, University of California 94143.
出版信息
Radiology. 1995 Mar;194(3):713-5. doi: 10.1148/radiology.194.3.7862967.
PURPOSE
To determine whether the diameter of the fetal lateral ventricular atrium is larger in male than in female fetuses.
MATERIALS AND METHODS
The atrial diameter in 219 fetuses retrospectively identified from a consecutive group of healthy newborns was measured without knowledge of the subject's sex.
RESULTS
Atrial size demonstrated a near-normal distribution, with mean size for all subjects 6.1 mm +/- 1.3 (standard deviation). When separated by sex, the mean atrial diameter of 122 female fetuses was 5.8 mm +/- 1.3, and the mean atrial diameter of 97 male fetuses was 6.4 mm +/- 1.3. The difference in mean size is statistically significant (P < .005).
CONCLUSION
Male fetuses have a slightly larger atrial size than female fetuses. This discovery has implications for defining the upper limit of normal for fetal ventricular atrial size.
目的
确定男性胎儿侧脑室房部直径是否大于女性胎儿。
材料与方法
从一组连续的健康新生儿中回顾性确定219例胎儿，在不知道研究对象性别的情况下测量其房部直径。
结果
房部大小呈近似正态分布，所有研究对象的平均大小为6.1毫米±1.3（标准差）。按性别分开后，122例女性胎儿的平均房部直径为5.8毫米±1.3，97例男性胎儿的平均房部直径为6.4毫米±1.3。平均大小的差异具有统计学意义（P < 0.005）。
结论
男性胎儿的房部大小略大于女性胎儿。这一发现对于确定胎儿心室房部大小的正常上限具有重要意义。
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