Comparison of the ratio of placental territory discordance to birthweight discordance in placentas of monochorionic diamniotic twins

The ratio of placental territory discordance to birthweight discordance was calculated in monochorionic diamniotic twin placentas. We then determined whether the ratio: (1) correlated with the overall diameter of the placental superficial vascular anastomoses and (2) was different in normal monochor...

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Bibliographic Details
Published inScience progress (1916) Vol. 104; no. 2; p. 368504211010595
Main Authors Xueju, Wang, Luyao, Li, Pengbo, Yuan, Huifeng, Shi, Yangyu, Zhao, Yuan, Wei
Format Journal Article
LanguageEnglish
Published London, England SAGE Publications 01.04.2021
Sage Publications Ltd
Subjects
Birth Weight
Discordance
Female
Fetal Growth Retardation
Fetofetal Transfusion
Humans
Placenta
Placenta - blood supply
Placenta Diseases
Pregnancy
Prospective Studies
Territory
Transfusion
placenta
twin to twin transfusion syndrome
selective intrauterine growth restriction
Vascular anastomoses
monochorionic twins
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Summary:The ratio of placental territory discordance to birthweight discordance was calculated in monochorionic diamniotic twin placentas. We then determined whether the ratio: (1) correlated with the overall diameter of the placental superficial vascular anastomoses and (2) was different in normal monochorionic diamniotic twin (normal MCDA), twin-to-twin transfusion syndrome (TTTS), and selective intrauterine growth restriction (sIUGR) pregnancies. A prospective study of MCDA placentas was conducted from April 1, 2016, to April 1, 2019, including three groups, normal MCDA (N = 49), TTTS (N = 38), and sIUGR (N = 52). Placentas were studied via dye injection. In the normal MCDA, sIUGR, and TTTS groups, the ratio positively correlated with the overall diameter of the placental superficial vascular anastomoses (Spearman’s = 0.295, 0.619, and 0.530; p = 0.040, <0.001, and 0.001, respectively) and gradually decreased from normal MCDA to sIUGR and to TTTS (2.88 (0.34, 64.25), 1.70 (0.27, 4.52), and 1.03 (0.12, 15.17); p < 0.001, p = 0.016/<0.001/0.005, respectively). The placental territory discordance to birthweight discordance ratio is an effective index reflecting the overall vascular anastomoses in MCDA placentas.
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ISSN:0036-8504
2047-7163
DOI:10.1177/00368504211010595