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MARSÁL KAREL MD; GENNSER, GERHARD MD, PhD; KULLANDER, STIG MD, PhD
Obstetrics & Gynecology: February 1978
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Fetal breathing movements in 14 twin pregnancies were examined with ultrasonic technique. The twin fetuses I in cephalic presentation showed a significantly higher percentage of apnea and periodic breathing compared with twin fetuses II. No such difference was found in twin pairs with Twin 1 in breech presentation. Also in the control group of 27 singleton pregnancies, the fetuses in cephalic presentation had a higher incidence of apnea and periodic breathing than those in breech presentation. The position of the fetus seems to be decisive for the character of the breathing movements before birth.

© 1978 The American College of Obstetricians and Gynecologists