Related Experiment Video
Updated: Jun 18, 2026
Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus
Published on: December 5, 2015
Hemodynamic changes in maternal renal arteries in twin pregnancy
Miwa Igarashi1, Hidehiko Miyake, Shunji Suzuki
1Department of Obstetrics and Gynecology, Japanese Red Cross Katsushika Maternity Hospital, 5-11-12 Tateishi, Katsushika-ku, Tokyo, Japan.
Aim:
We examined whether the Doppler waveforms of the maternal renal main arteries are altered in women with twin pregnancy compared with those in singleton pregnancy.
Methods:
The indices of vascular resistance and acceleration time of the maternal main renal arteries were obtained from 19 healthy women at 37-38 weeks of singleton gestation and 17 women at the same gestational age with non-preeclamptic twin gestation.
Results:
There were no significant differences in the indices of vascular resistance between the singleton and twin groups. However, the acceleration time was significantly prolonged in the twin pregnancy group compared with that in the singleton pregnancy group (83.7 +/- 24 vs. 59.8 +/- 12 ms, p < 0.01).
Conclusion:
The current results imply that maternal renal arteries are more significantly affected by hemodynamic changes in twin pregnancy than in singleton pregnancy.
Related Concept Videos
01:33Hormonal Regulation
01:14Fetal Circulation
Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...