First- and second-trimester ultrasound assessment of gestational age

被引:83
作者
Kalish, RB
Thaler, HT
Chasen, ST
Gupta, M
Berman, SJ
Rosenwaks, Z
Chervenak, FA
机构
[1] Cornell Univ, Weill Med Coll, Div Maternal Fetal Med, Dept Obstet & Gynecol, New York, NY 10021 USA
[2] Mem Sloan Kettering Canc Ctr, Dept Epidemiol & Biostat, New York, NY 10021 USA
关键词
gestational age; ultrasound; in vitro fertilization;
D O I
10.1016/j.ajog.2004.06.053
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
Objective: The purpose Of this Study was to evaluate and compare the accuracy of first- and second-trimester ultrasound assessment of fetal age. Study design: Differences between ultrasound estimated gestational age and true gestational age were calculated between 11 to 14 weeks of gestation and 18 to 22 weeks of gestation for singleton, twin, and triplet pregnancies that were conceived by in vitro fertilization. Results: One hundred four singleton pregnancies, 81 twin pregnancies, and 33 triplet pregnancies were included. First trimester ultrasound estimates overestimated gestational age by a mean (+/- SEM) of 1.3 +/- 0.2 days (P <.0001) for singleton pregnancies, 1.4 +/- 0.2 days (P <.0001) for twin pregnancies, and 0.8 +/- 0.4 days (P =.027) for triplet pregnancies. Second trimester estimates were underestimated by a mean of -0.1 +/- 0.4 days (P = .87) for singletons, -0.6 +/- 0.3 days (P =.083) for twins, and -0.6 +/- 0.5 days (p = 0.21) for triplets. Conclusion: Ultrasound assessment of gestational age is very accurate and is marginally better in the first trimester compared with the second. (C) 2004 Elsevier Inc. All rights reserved.
引用
收藏
页码:975 / 978
页数:4
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