The Leeds Teaching Hospitals NHS Trust

Research and Innovation

UK Obstetric Surveillance System (UKOSS)


This is an observational study the aim of which is to determine the incidence of hospitalisation with pandemic Covid-19 infection in pregnancy 


This is a study which is considered a national priority.

Other Information

It is currently unknown what impact COVID-19 will have on pregnant women and their children.

The UKOSS Study aims to find out:
What are the outcomes of Covid-19 infection in pregnancy for both mother and infant?

What are the characteristics of women who are hospitalised with pandemic Covid-19 infection in pregnancy and do these characteristics influence disease outcome?

How does the treatment of pandemic Covid-19 infection in pregnancy influence outcomes for mother and infant?

Led by Oxford University, Leeds Teaching Hospitals is one of the UK sites recruiting patients to the study.

The study is funded by the National Institute for Health Research (NIHR).

For more information visit the study website