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Persistence of abnormal uterine artery flow postpartum: Case-control study
Amir Naeh1, Alexandra Berezowsky1, Shimrit Salem Yaniv1
1Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, St. Michael's Hospital, Toronto, Ontario, Canada.
Pregnancy Hypertension
|June 6, 2022
Summary
This study found that pregnancies with preeclampsia or intrauterine growth restriction (IUGR) showed higher umbilical artery (UA) pulsatility index (PI) early in gestation. Postpartum UA PI may indicate altered physiologic recovery in these pregnancies.
Area of Science:
- Obstetrics and Gynecology
- Fetal Medicine
- Perinatal Research
Background:
- Placental insufficiency is a significant concern in singleton pregnancies.
- Early detection and monitoring of fetal well-being are crucial.
- Umbilical artery (UA) Doppler assessment is a key tool in evaluating placental function.
Purpose of the Study:
- To compare UA Doppler indices between pregnancies complicated by preeclampsia/intrauterine growth restriction (IUGR) and unaffected pregnancies.
- To investigate the postpartum recovery of UA flow patterns after pregnancies affected by placental insufficiency.
Main Methods:
- A cohort study design was employed.
- Singleton pregnancies with risk factors for placental insufficiency were assessed.
- UA Doppler assessment was performed at 18-22 weeks' gestation and 6 weeks postpartum.
- 15 pregnancies with preeclampsia/IUGR were compared to 17 unaffected controls.
Main Results:
- Pregnancies with preeclampsia and/or IUGR exhibited higher UA pulsatility index (PI) at 18-22 weeks' gestation compared to controls.
- Postpartum mean UA PI values were 2.60 for cases and 2.14 for controls (p=0.20).
Conclusions:
- Elevated early-gestation UA PI may be indicative of placental insufficiency.
- A potentially different trajectory for the physiologic recovery of UA flow exists after pregnancies complicated by placental insufficiency.
