Teixeira L S, Leite J, Castro Viegas M J B, Faria M M L, Pires M C, Teixeira H C, Teixeira R C, Pettersen H
Serviço de Medicina Fetal-Eccos-Clinica da Imagem, Universidade Federal de Minas Gerais, Minas Gerais, Brazil.
Ultrasound Obstet Gynecol. 2008 Jul;32(1):12-4. doi: 10.1002/uog.5330.
Recent findings have suggested that ductus venosus blood flow may be influenced by fetal gender. The aim of this study was to investigate further the influence of fetal gender on ductus venosus Doppler flow in the first trimester.
This was a cross-sectional and retrospective study performed between January 1998 and January 2003. A total of 932 fetuses at between 10 and 14 weeks' gestation were included. The following inclusion criteria were used: singleton gestation; crown-rump length between 39 and 84 mm; and absence of fetal anomalies. The following variables of the ductus venosus were evaluated: peak velocity during ventricular systole (S-wave) and diastole (D-wave); nadir during atrial contraction in late diastole (A-wave); pulsatility index for veins (PIV); peak velocity index for veins (PVIV); and time-averaged maximum velocity (TAMXV).
Four hundred and forty-eight (48.1%) female and 484 (51.9%) male fetuses were included in the study. Comparing males and females at between 10 and 14 weeks' gestation, there was no statistically significant difference in S-wave, D-wave, A-wave, PIV, PVIV or TAMXV.
Our study suggests that fetal gender does not influence ductus venosus blood flow in the first trimester.
最近的研究结果表明，静脉导管血流可能受胎儿性别的影响。本研究的目的是进一步探讨孕早期胎儿性别对静脉导管多普勒血流的影响。
这是一项于1998年1月至2003年1月期间进行的横断面回顾性研究。共纳入932例妊娠10至14周的胎儿。采用以下纳入标准：单胎妊娠；顶臀长在39至84毫米之间；无胎儿畸形。评估静脉导管的以下变量：心室收缩期（S波）和舒张期（D波）的峰值速度；舒张末期心房收缩期的最低点（A波）；静脉搏动指数（PIV）；静脉峰值速度指数（PVIV）；以及时间平均最大速度（TAMXV）。
本研究纳入了448例（48.1%）女胎和484例（51.9%）男胎。比较妊娠10至14周的男胎和女胎，S波、D波、A波、PIV、PVIV或TAMXV均无统计学显著差异。
我们的研究表明，孕早期胎儿性别不影响静脉导管血流。
