Correlation of Anxiety and Uterine Artery Doppler Flow in Pregnant Women with High Risk of Down syndrome: A Prospective Cohort Study
Abstract Background: Maternal anxiety may lead to unfavorable pregnancy outcomes, but the underlying mechanism is unclear. This study aimed to evaluate the correlation between maternal anxiety and uterine blood flow index in pregnant women with high risk of Down syndrome undergoing amniocentesis.Methods: This prospective cohort study was conducted at 15-18 weeks of gestational age on 199 pregnant women with high-risk of Down syndrome, candidates for amniocentesis, and 176 pregnant women at low-risk of Down syndrome in the control group from 2017 to 2019. Anxiety state by Spielberger’s State-Trait Anxiety Inventory (STAI) and uterine artery blood flow indices were assessed at baseline and two weeks follow-up visits (immediately before amniocentesis and after receiving the karyotype results in the amniocentesis group). Results: The mean±SD age of participants was 33.11 ± 5.96 years. There were 176 negative and 23 positive results for Down syndrome in the amniocentesis group. State-Trait Anxiety Inventory scores were significantly different between the amniocentesis and control groups at baseline and follow up (p = 0.033 and p=0.003 respectively) and between baseline and follow-up assessments in the amniocentesis-negative group (p = 0.001, with lower follow-up scores). A significant decrease was observed between baseline and follow-up uterine PI in amniocentesis group (p<0.05), and between baseline and follow-up uterine RI in both amniocentesis and control groups (p <0.001). There was a significant but weak correlation between uterine RI and State-Trait Anxiety Inventory scores at follow-up (r=0.137, p=0.008).Conclusions: Maternal anxiety may decrease uterine artery blood flow in pregnancy.Trial registration: IR.TUMS.IKHC.REC.1397.174