Evidence of early first-trimester growth restriction in pregnancies that subsequently end in miscarriage

BJOG : an International Journal of Obstetrics and Gynaecology
F MukriA T Papageorghiou

Abstract

To examine whether viable early pregnancies that subsequently end in miscarriage exhibit evidence of first-trimester growth restriction. Prospective cohort study. Early pregnancy unit (EPU) of a teaching hospital. Women attending EPU between 5 and 10 weeks of gestation. Women with spontaneously conceived intrauterine, viable singleton pregnancies with certain last menstrual period and regular cycles were included. The deviation between the observed and expected crown-rump length (CRL) for gestation was calculated and expressed as a z score. Pregnancies were followed up until the 11-14 week scan, and the deviation between those that remained viable and miscarried subsequently was calculated. Viability at 11-14 week scan. Over 6 months, 316 women met the inclusion criteria. Twenty-four (7.4%) women were excluded. Of the remaining 292, the pregnancy remained viable in 251 (86%) and 41 (14%) suffered a miscarriage. At the first transvaginal ultrasound, the z score of the mean measured CRL for pregnancies that remained viable was -0.82, SD 1.46, while in pregnancies that subsequently miscarried the z score was -2.42 and the CRL was significantly smaller, SD 1.31 (P < 0.0001). In the latter group, the initial CRL was below the expect...Continue Reading

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