Journal of International Reproductive Health/Family Planning ›› 2022, Vol. 41 ›› Issue (2): 94-100.doi: 10.12280/gjszjk.20210510

• Original Article • Previous Articles     Next Articles

Correlation between the Predominant Blood Flow in the Chorionic Villi and Early Spontaneous Abortion

ZHANG Yi, WANG Hong(), ZHANG Zhi-kun(), ZHANG Qi, XIE Qing, WANG Xin-yan, ZHANG Yin-feng   

  1. Chengde Medical College, Chengde 067000, Hebei Province, China (ZHANG Yi); Department of Ultrasound, Chengde Central Hospital, Chengde 067000, Hebei Province, China (WANG Hong); Department of Ultrasound (ZHANG Zhi-kun, ZHANG Qi, XIE Qing), Center for Reproductive Medicine (WANG Xin-yan, ZHANG Yin-feng), Tianjin Central Hospital of Gynecology Obstetrics, Tianjin 300100, China
  • Received:2021-11-02 Published:2022-03-15 Online:2022-03-29
  • Contact: WANG Hong,ZHANG Zhi-kun E-mail:hongwang_wh@126.com;zkunlin@sina.com

Abstract:

Objective: To observe the predominant blood flow in the chorionic villi during early pregnancy using ultrasound HD-Flow modality, and to explore the relationship between its changes and early spontaneous abortion. Methods: In women with singleton pregnancy after in vitro fertilization-embryo transfer (IVF-ET), ultrasound examinations were performed at 5, 7 and 12-13 weeks of gestation to measure the predominant flow signal in the chorionic villi and indicators of the gestational sac, yolk sac, embryo and fetal heartbeat. The changes of the predominant flow signal in the chorionic villi with the gestational age, and the related factors, were analysed. The relationship between the flow signal length and the risk of early miscarriage were analyzed. Results: The presence of the predominant flow in the chorionic villi was confirmed in women who underwent IVF-ET, and the length of flow signal was increased with the increasing gestational age. The detection rate and length of this flow signal were significantly higher in the sustained pregnancy group than those in the early spontaneous abortion group (P<0.001). At 7 weeks of gestation, the risk of early spontaneous abortion in women with flow signal lengths below the 5th percentile was 10.84 times higher than that in women with flow signal lengths above the 5th percentile of the same gestational week (OR=10.84, 95%CI: 6.12-19.22, P<0.001). Conclusions: There is a predominant flow signal in the placental villi region during early pregnancy. The too short length of this signal may suggest an increased risk of early spontaneous abortion.

Key words: Pregnancy trimester, first, Ultrasonography, Doppler, Placenta, Abortion, spontaneous, Predominant flow in chorionic villi