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Related Experiment Video

Updated: May 30, 2026

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

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Fetal behavior in normal dichorionic twin pregnancy.

E J H Mulder¹, J B Derks, M W M de Laat

¹Department of Perinatology and Gynaecology, Wilhelmina Children's Hospital, University Medical Centre, Utrecht, The Netherlands. emulder@umcutrecht.nl

Early Human Development

|August 9, 2011

Summary

This summary is machine-generated.

Fetal twins show different behavioral development than singletons, with poor synchrony in movements and independent rest-activity cycles. Previous studies may have overestimated twin movement synchrony.

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Published on: October 25, 2015

Area of Science:

Fetal development
Maternal-fetal medicine
Twin studies

Background:

Fetal behavioral development is crucial for assessing well-being.
Understanding twin interactions provides insights into developmental processes.
Previous research suggested high synchrony in fetal twin movements.

Purpose of the Study:

Compare fetal behavioral development in dichorionic twins and singletons.
Identify intra-pair associations (synchrony) of fetal movements and rest-activity cycles in twins.
Evaluate synchrony using different criteria.

Main Methods:

Prospective study of 20 dichorionic twin pregnancies.
Serial simultaneous 1-hour ultrasound recordings of fetal movements (11-40 weeks' gestation).
Comparison of twin movement incidences with singleton reference values.

Main Results:

Twin fetuses exhibited less generalized body movement (GM) than singletons but higher breathing activity in the third trimester.
Intra-pair correlation of fetal GM, quiescence, and breathing was fair.
Temporal synchrony of fetal activities was poor, especially after 30 weeks' gestation, with independent rest-activity cycles.

Conclusions:

Normal dichorionic fetal twins demonstrate differential behavioral development compared to singletons.
Fetal twin pairs show poor synchrony in movements and independent rest-activity cycles.
Existing research may have overestimated the degree of intra-pair movement synchrony in fetal twins.