Examining COVID-19 effects during pregnancy and risks of transmission

Coronavirus Disease 2019 (COVID-19) During Pregnancy: Prevalence of Seroconversion, Effect on Maternal and Perinatal Outcomes and Risk of Vertical Transmission (COVID-MAP)

Observational Chinese University of Hong Kong · NCT04465474

This study looks at how COVID-19 affects pregnant women and their babies, including the chances of passing the virus from mother to child.

Quick facts

Study typeObservational
Enrollment3000 (estimated)
Ages18 Years and up
SexFemale
SponsorChinese University of Hong Kong Academic / other
Locations10 sites (Beijing, Beijing and 9 other locations)
Trial IDNCT04465474 on ClinicalTrials.gov

What this trial studies

This observational study aims to assess the prevalence of SARS-CoV-2 seroconversion among pregnant women in Hong Kong and evaluate the impact of COVID-19 on maternal and perinatal outcomes. It will investigate the rates of infection in women experiencing miscarriage and stillbirth, track the pregnancy course of confirmed COVID-19 cases, and analyze the risk of vertical transmission of the virus. The study will involve collaboration among various medical specialists and will utilize both longitudinal and cross-sectional methodologies to gather comprehensive data. Additionally, it will explore the placental barrier and immune responses related to vertical transmission.

Who should consider this trial

Good fit: Ideal candidates include pregnant women attending Down syndrome screening or those presenting with miscarriage or stillbirth in Hong Kong and Spain.

Not a fit: Patients who are not pregnant or those who have not been affected by COVID-19 may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide critical insights into the risks of COVID-19 during pregnancy, potentially improving maternal and fetal health outcomes.

How similar studies have performed: Previous studies have shown varying results regarding COVID-19's impact on pregnancy, but this study aims to systematically collect data, making it a novel approach.

Eligibility criteria

Show full inclusion / exclusion criteria
Objective 1: Seroconversion during pregnancy

Inclusion criteria:

* Pregnant women who attended for Down syndrome screening (DSS) at 11-13 weeks
* Had serum sample taken between 1 November 2019 and 1 June 2020 consented for stored serum for future research
* Intended to deliver at the booking hospital.

Objective 2: SARS-CoV-2 and pregnancy loss

Inclusion criteria:

•Pregnant women presenting with first and second trimester miscarriage in Hong Kong and Spain, as well as those with stillbirth during periods of 6 and 12 months, respectively.

Objective 3: Pregnancy course and perinatal outcome

Inclusion criteria:

•Pregnant women affected by COVID-19

Objective 4: Vertical transmission

Inclusion criteria:

•Pregnant women affected by COVID-19

Objective 5: Potential mechanisms for vertical transmission

Inclusion criteria:

•Pregnant women affected by COVID-19

Where this trial is running

Beijing, Beijing and 9 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions COVID-19pregnancyvertical transmissionpregnancy lossACE2 TMPRSS2
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.