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Acid-Base Differences in Preterm and Term Twin Pregnancy

Published online by Cambridge University Press:  01 August 2014

S.A. Ordorica ,
I.A. Hoskins  and
B.K. Young
S.A. Ordorica*
Affiliation:
Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, New York University Medical Center, USA
I.A. Hoskins
Affiliation:
Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, New York University Medical Center, USA
B.K. Young
Affiliation:
Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, New York University Medical Center, USA
*
New York University Medical Center, 530 First Avenue, Suite 5 F, New York, NY 10016, USA

Abstract

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A prospective study was undertaken which examined 179 sets of twins, 68 premature (less than 36 weeks of gestation) and 111 term. The purpose of this study was to assess differences in the acid-base status between twins related to gestational age, birth order and the time interval between twin births. Although the twin blood-gas data is within the range considered normal, statistically significant differences favoring the first-born were noted for both preterm and term twins. These differences do not depend on gestational age, route of delivery or presentation, and become evident when the interval between twin births exceeds one minute. We postulate that after delivery of the first twin, the reduced uterine size causes a decrease in the intervillous blood flow and consequently a reduction in the respiratory exchange between the second fetus, still in utero, and its placenta.

Keywords

TwinsPretermTermUmbilical blood gasApgar scoreBirth order
Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 40 , Issue 3-4 , October 1991 , pp. 361 - 372
Copyright
Copyright © The International Society for Twin Studies 1991

References

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