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Normal ranges of embryonic length, embryonic heart rate, gestational sac diameter and yolk sac diameter at 6-10 weeks.
Papaioannou GI, Syngelaki A, Poon LC, Ross JA, Nicolaides KH.
Fetal Diagn Ther 2010;28:207-19. -
Maternal thyroid function at 11 to 13 weeks of gestation and subsequent fetal death.
Ashoor G, Maiz N, Rotas M, Jawdat F, Nicolaides KH.
Thyroid 2010;20:989-93.