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CHAPTER 30 The First Trimester 1085

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72. Aziz S, Cho RC, Baker DB, et al. Five-millimeter and smaller embryos

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73. Rowling SE, Coleman BG, Langer JE, et al. First-trimester US parameters

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74. Harris RD, Couto C, Karpovsky C, et al. he chorionic bump: a irst-trimester

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76. Giacomello F. Small size as a predictor of poor fetal outcome [letter].

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77. Horrow MM. Enlarged amniotic cavity: a new sonographic sign of early

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78. Yegul NT, Filly RA. he expanded amnion sign: evidence of early embryonic

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79. Filly RA. he expanded amnion sign: evidence of early embryonic death

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80. Kucuk T, Duru NK, Yenen MC, et al. Yolk sac size and shape as

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81. Gürel SA, Gürel H. A large yolk sac may be important in the early diagnosis

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82. Szabo J, Gellen J, Szemere G, Farago M. Signiicance of hyper-echogenic

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83. Doubilet P, Benson C. Outcome of irst-trimester pregnancies with slow

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84. Doubilet PM, Benson CB, Chow JS. Long-term prognosis of pregnancies

complicated by slow embryonic heart rates in the early irst trimester.

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85. Vaccaro H, Amor F, Leyton M, Sepulveda W. Arrhythmia in early pregnancy:

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86. Doubilet PM, Benson CB, Chow JS. Outcome of pregnancies with rapid

embryonic heart rates in the early irst trimester. AJR Am J Roentgenol.

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87. Sauerbrei EE, Pham DH. Placental abruption and subchorionic hemorrhage

in the irst half of pregnancy: US appearance and clinical outcome. Radiology.

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88. Ball RH, Ade CM, Schoenborn JA, Crane JP. he clinical signiicance of

ultrasonographically detected subchorionic hemorrhages. Am J Obstet

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89. Pedersen JF, Mantoni M. Prevalence and signiicance of subchorionic

hemorrhage in threatened abortion: a sonographic study. AJR Am J

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90. Bennett GL, Bromley B, Lieberman E, Benacerraf BR. Subchorionic hemorrhage

in irst-trimester pregnancies: prediction of pregnancy outcome with

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