Reduced fetal movements and COVID-19 infection: a retrospective cohort study

Fetal movements are an important indicator of fetal well-being; therefore, reduced fetal movements (RFMs) can indicate fetal compromise. RFM is associated with fetal growth restriction (FGR) and intrauterine fetal death (IUFD). Studies have implied that COVID-19 infection increases the risk of adverse fetal outcomes, such as preterm birth and IUFD. It is unclear how COVID-19 infection may aggravate these fetal outcomes among women presenting with RFM. The aims of the study were to (1) determine whether adverse fetal outcomes in women with RFM increased in 2020 compared to 2019, the year before the pandemic, and (2) evaluate whether maternal COVID-19 infection during pregnancy was a risk factor for adverse fetal outcomes in comparison to previously established risk factors among women seeking care for RFM.

All women who sought care due to RFM and were delivered at Soder Hospital from 2019 to 2020 were included. Fetal composite outcomes were constructed and compared between women with RFM and COVID-19 and women with RFM but without COVID-19.

COVID-19 infection did not increase the risk of adverse fetal outcomes in women who sought care for RFM. A twofold risk for adverse fetal outcomes was found among all primiparous women vs. multiparous women with RFM (98/788 [12.4%] vs 37/644 [9.8%], AOR = 2.5, 95% CI (1.6-3.7).

The proportion of adverse composite outcomes among women with RFM during the first year of the pandemic did not increase compared to the year before. Composite outcomes were marginally higher in the COVID-19-positive group compared to the COVID-19-negative group, but it was not statistically significant.