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Ultrasound screening may be limited in ability to predict perinatal complications

Date:
October 13, 2020
Source:
PLOS
Summary:
Delivering a newborn with macrosomia (weighing more than 8 pounds, 13 ounces at birth) may be associated with higher risk of adverse outcomes, including perinatal death and injuries related to traumatic delivery, such as stuck shoulders (shoulder dystocia).
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Delivering a newborn with macrosomia (weighing more than 8 pounds, 13 ounces at birth) may be associated with higher risk of adverse outcomes, including perinatal death and injuries related to traumatic delivery, such as stuck shoulders (shoulder dystocia). A study in PLOS Medicine by Gordon Smith at the University of Cambridge and colleagues suggests that third trimester fetal ultrasound screening has the ability to identify more pregnancies with macrosomia.

The diagnostic effectiveness of ultrasound screening in predicting the delivery of a macrosomic infant, shoulder dystocia and associated neonatal morbidity is not well established. To better understand the relationship between estimated fetal weight (EFW), macrosomia, and perinatal complications, researchers systematically reviewed the literature from four different clinical databases. The authors then analyzed 41 studies involving 112,034 non-high risk patients who had undergone a third trimester ultrasound screening as part of universal screening.

The authors found that a third trimester ultrasonic EFW showing increased risk of a large baby reliably predicted delivery of a macrosomic infant. However, a larger EFW was not strongly associated with the risk of shoulder dystocia in low and medium-risk pregnancies. The study was limited by variation in included studies representing differences in screening in various countries.

According to the authors, "We recommend caution prior to introducing universal third trimester screening for macrosomia as it would increase the rates of intervention, with potential iatrogenic harm, without clear evidence that it would reduce neonatal morbidity."


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Journal Reference:

  1. Alexandros A. Moraitis, Norman Shreeve, Ulla Sovio, Peter Brocklehurst, Alexander E. P. Heazell, Jim G. Thornton, Stephen C. Robson, Aris Papageorghiou, Gordon C. Smith. Universal third-trimester ultrasonic screening using fetal macrosomia in the prediction of adverse perinatal outcome: A systematic review and meta-analysis of diagnostic test accuracy. PLOS Medicine, 2020; 17 (10): e1003190 DOI: 10.1371/journal.pmed.1003190

Cite This Page:

PLOS. "Ultrasound screening may be limited in ability to predict perinatal complications." ScienceDaily. ScienceDaily, 13 October 2020. <www.sciencedaily.com/releases/2020/10/201013141754.htm>.
PLOS. (2020, October 13). Ultrasound screening may be limited in ability to predict perinatal complications. ScienceDaily. Retrieved July 21, 2024 from www.sciencedaily.com/releases/2020/10/201013141754.htm
PLOS. "Ultrasound screening may be limited in ability to predict perinatal complications." ScienceDaily. www.sciencedaily.com/releases/2020/10/201013141754.htm (accessed July 21, 2024).

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