Patel M D, Goldstein R B, Tung S, Filly R A
Department of Radiology, San Francisco General Hospital, University of California 94143.
Radiology. 1995 Mar;194(3):713-5. doi: 10.1148/radiology.194.3.7862967.
To determine whether the diameter of the fetal lateral ventricular atrium is larger in male than in female fetuses.
The atrial diameter in 219 fetuses retrospectively identified from a consecutive group of healthy newborns was measured without knowledge of the subject's sex.
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).
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.
确定男性胎儿侧脑室房部直径是否大于女性胎儿。
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。
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）。
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。
