Pregnancy dating by fetal crown-rump length: a systematic review of charts.
BACKGROUND: Fetal crown-rump length (CRL) measurement by ultrasound in the first trimester is the standard method for pregnancy dating; however, a multitude of CRL equations to estimate gestational age (GA) are reported in the literature. OBJECTIVE: To evaluate the methodological quality used in stu...
| Main Authors: | , , , , , , , |
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| 格式: | Journal article |
| 语言: | English |
| 出版: |
2014
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