Centro de Atenção a Mulher, Instituto de Medicina Integral Prof. Fernando Figueira, Recife, Brazil.
Arch Gynecol Obstet. 2011 Aug;284(2):299-302. doi: 10.1007/s00404-010-1644-5. Epub 2010 Aug 17.
The aim of this study was to determine the correlation between fetal transverse cerebellar diameter (TCD) and gestational age of male and female fetus in women under low-risk prenatal care between the 13th and 40th week of gestation.
A cross-sectional study was carried out with 184 pregnant women, at the age of 18 years or more, gestational age ranging from 13 to 40 weeks, with a single fetus. A single TCD measurement by ultrasound was used for each fetus. Correlations between fetal TCD and gestational age were determined for the whole sample and each gender separately.
We identified 102 males and 82 female fetuses. A linear correlation was observed between fetal TCD and gestational age for the whole sample (r = 96.9%; p < 0.001). A significant linear correlation was also observed for both males (r = 97.0%; p < 0.001) and females (r = 96.9%; p < 0.001). Comparing the regression lines between genders, no significant difference was observed.
The data of this study suggest TCD fetal ultrasound as a predictive biometric parameter of gestational age independently of fetal gender in the last two trimesters of a pregnancy.
本研究旨在确定在 13 至 40 孕周期间接受低风险产前检查的女性中，男性和女性胎儿的横径小脑直径（TCD）与胎龄之间的相关性。
这是一项横断面研究，共纳入 184 名年龄在 18 岁及以上、孕周在 13 至 40 周、单胎妊娠的孕妇。对每个胎儿进行单次 TCD 超声测量。确定整个样本和每个性别组中 TCD 与胎龄之间的相关性。
我们共发现 102 名男性胎儿和 82 名女性胎儿。整个样本中 TCD 与胎龄之间存在线性相关（r = 96.9%；p < 0.001）。男性（r = 97.0%；p < 0.001）和女性（r = 96.9%；p < 0.001）也存在显著的线性相关性。比较性别间的回归线，未见显著差异。
本研究的数据表明，在妊娠的最后两个三个月中，TCD 胎儿超声可作为胎龄的预测性生物计量参数，与胎儿性别无关。
