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Evolution of the lambda or twin/chorionic peak sign in dichorionic twin pregnancies.
Sepulveda W, Sebire NJ, Hughes K, Kalogeropoulos A, Nicolaides KH.
Obstet Gynecol 1997;89:439-41. -
The prevalence and consequence of missed abortion in twin pregnancies at 10-14 weeks of gestation.
Sebire NJ, Thornton S, Hughes K, Snijders RJM, Nicolaides KH.
BJOG 1997;104:847-8. -
Maternal serum free beta-hCG at 10 to 14 weeks of gestation in trisomic twin pregnancies.
Noble PL, Snijders RJ, Abraha HD, Sherwood RA, Nicolaides KH.
BJOG 1997;104:741-3.