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Updated: Mar 27, 2026

Accurate and Simple Evaluation of Vascular Anastomoses in Monochorionic Placenta using Colored Dye
Published on: September 5, 2011
Metabolic scaling and twin placentas
C M Salafia1, N Kiryankova1, H Inany2
1Obstetrics and Gynecology, NewYork Methodist Hospital, Brooklyn, NY, USA.
Objective:
Do monochorionic (MC) and/or dichorionic (DC) twins show allometric scaling between placental and birth weight (PW, BW)?
Methods:
We extracted BW, PW, gestational age (GA) and cord insertion type from 52 MC to 310 DC twins to calculate β. DC twins were analyzed as summed and as individuals if placentas were separate.
Results:
Mean β for MC (0.78 ± 0.02), DC summed (0.78 ± 0.02), and DC with separate placentas (0.77 ± 0.03 and 0.76 ± 0.04) all non-significant. GA, summed BWs, total PW, BW discordance, and cord insertion sites did not differ between twin types or with β.
Conclusion:
MC and DC twins show allometric scaling similar to singletons.
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