Leroy B, Lefort F, Jeny R
Acta Genet Med Gemellol (Roma). 1982;31(3-4):195-8. doi: 10.1017/s000156600000828x.
From previous research, which gave standard curves for the evolution of uterine height and umbilical perimeter according to gestational age in the case of single pregnancies, the authors propose curves which show the variations of these two parameters in twin pregnancies. The observed differences are sufficient to allow a diagnosis of twin pregnancy as soon as the 18th week of amenorrhea. This observation is interesting because, until now, a systematic early B-scan examination has not been performed as a rule.
根据先前的研究，该研究给出了单胎妊娠时子宫高度和脐周周长随孕周变化的标准曲线，作者提出了显示双胎妊娠中这两个参数变化的曲线。观察到的差异足以在闭经第18周时就诊断出双胎妊娠。这一观察结果很有趣，因为到目前为止，通常并没有进行系统性的早期B超检查。
