The lambda sign at 10-14 weeks of gestation as a predictor of chorionicity in twin pregnancies.

@article{Sepulveda1996TheLS,
  title={The lambda sign at 10-14 weeks of gestation as a predictor of chorionicity in twin pregnancies.},
  author={W Sepulveda and N. J. Sebire and Kevin S. Hughes and Anthony O Odibo and Kypros H. Nicolaides},
  journal={Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology},
  year={1996},
  volume={7 6},
  pages={421-3}
}
Chorionicity was prospectively determined in 369 twin pregnancies by ultrasound at 10-14 weeks of gestation. Pregnancies were classified as monochorionic if there was a single placental mass in the absence of the lambda sign at the inter-twin membrane-placental junction, and dichorionic if there was a single placental mass but the lambda sign was present, or the placentas were not adjacent to each other. In 81 (22%) cases, the pregnancies were classified as monochorionic and in 288 (78%) as… CONTINUE READING

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