Coronavirus 'mild' in nine out of 10 pregnant women

But there were postpartum critical cases reported in the study from two US hospitals

Pregnant women with COVID-19 are often asymptomatic, and nearly nine out of 10 will have only mild disease, according to a study from two New York City hospitals.

The study includes all 43 pregnant women with COVID-19 treated at Columbia University Medical Centre and New York Presbyterian Hospital between 13 March and 27 March, 18 of whom delivered babies during that time.

The authors note pregnant women were tested for COVID-19 if they had symptoms, known exposures, or recent travel. From 22