Association between maternal anxiety in pregnancy and increased uterine artery resistance index: cohort based study

Abstract

Objective: To investigate whether maternal anxiety in the third trimester is associated with an increased uterine artery resistance index. Design: Cohort based study. Subjects: 100 pregnant women, with a mean gestation of 32 weeks. Outcome measures: Self rating Spielberger questionnaire for state anxiety and trait anxiety, and uterine blood flow waveform patterns as assessed by colour Doppler ultrasound. Results: A significant association was found between uterine artery resistance index and scores for both Spielberger state anxiety and trait anxiety (rs=0.31, PConclusions: This study shows an association between maternal anxiety in pregnancy and increased uterine artery resistance index. It suggests a mechanism by which the psychological state of the mother may affect fetal development, and may explain epidemiological associations between maternal anxiety and low birth weight. The influence of maternal anxiety may be one mechanism by which the intrauterine environment contributes to later disease in offspring.