Moderna COVID-19 Vaccine mRNA-1273 Observational Pregnancy Outcome Study
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ClinicalTrials.gov Identifier: NCT04958304 |
Recruitment Status :
Recruiting
First Posted : July 12, 2021
Last Update Posted : January 9, 2023
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Condition or disease |
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SARS-CoV-2 |
Study Type : | Observational [Patient Registry] |
Estimated Enrollment : | 1000 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Target Follow-Up Duration: | 21 Months |
Official Title: | Moderna mRNA-1273 Observational Pregnancy Outcome Study |
Actual Study Start Date : | September 1, 2021 |
Estimated Primary Completion Date : | December 9, 2023 |
Estimated Study Completion Date : | January 6, 2024 |

Group/Cohort |
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Moderna COVID-19 Vaccine in Pregnant Women
The Moderna COVID-19 Vaccine Pregnancy Registry will collect primary data from pregnant women who have received the Moderna COVID-19 vaccine and their healthcare providers (HCPs).
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- Number of Participants Having Infants With Suspected Major and Minor Congenital Malformations [ Time Frame: Up to 1 year of infant age ]Major malformations are those that have significant medical, social or cosmetic consequences, and typically require surgical intervention or are life-threatening (for example, cleft lip, spina bifida).
- Number of Participants With Any Pregnancy Complications [ Time Frame: From end of first trimester (approximately 14 weeks) up to mid-third trimester (approximately 34 weeks) ]Pregnancy complications may include preeclampsia, eclampsia, pregnancy-induced hypertension, antenatal bleeding, preterm labor, gestational diabetes, dysfunctional labor, premature rupture of membranes, placenta previa, postpartum hemorrhage, small-for-gestational-age (SGA) fetus and intrauterine growth restriction (IUGR), and non-reassuring fetal status.
- Number of Participants With Any Pregnancy Outcomes [ Time Frame: Approximately 4 weeks after expected date of delivery (EDD) ]Pregnancy outcomes may include spontaneous abortions, fetal death or stillbirth, live birth, elective or therapeutic pregnancy terminations, preterm birth, ectopic pregnancies, molar pregnancies, maternal death, and COVID-19 diagnosis.
- Number of Participants With Infant Outcomes [ Time Frame: Up to 1 year of infant age ]Infant outcomes may include minor congenital malformations, size of gestational age, low birth weight, size for age, failure to thrive, hospitalization of infants, neonatal death, perinatal death, neonatal encephalopathy, respiratory distress in the newborn, neonatal/infant infection, infant death, and infant developmental milestones.

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | Female |
Accepts Healthy Volunteers: | Yes |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- Currently pregnant
- The outcome of pregnancy (that is, pregnancy loss or live birth) must not be known at entry.
- Agrees to electronically sign the release of medical information form permitting the study to contact her HCPs (for example, primary care provider [PCP], obstetrician, nurse midwife) and the infant's HCP (for example, pediatrician) for medical information.
- Received the Moderna COVID-19 vaccine at any point from 28 days prior to last menstrual period (LMP) throughout pregnancy.
Exclusion Criteria:
- Participant has received any other COVID-19 vaccines at any point from 28 days prior to LMP throughout pregnancy.
- Women currently participating in another investigational device or drug study, currently taking an investigational medicinal product, or having taken an investigational product within 28 days prior to LMP or during pregnancy.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04958304
Contact: Moderna Clinical Trials Support Center | 1-877-777-7187 | clinicaltrials@modernatx.com |
United States, North Carolina | |
IQVIA Call Center for United States and Canada | Recruiting |
Durham, North Carolina, United States, 27703 |
Responsible Party: | ModernaTX, Inc. |
ClinicalTrials.gov Identifier: | NCT04958304 |
Other Study ID Numbers: |
mRNA-1273-P902 |
First Posted: | July 12, 2021 Key Record Dates |
Last Update Posted: | January 9, 2023 |
Last Verified: | January 2023 |
mRNA-1273 mRNA-1273 vaccine SARS-CoV-2 SARS-CoV-2 Vaccine Coronavirus |
Virus Diseases Messenger RNA COVID-19 COVID-19 Vaccine Moderna |