Prospective Study of Pregnancy in Women With Cystic Fibrosis (MAYFLOWERS)
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ClinicalTrials.gov Identifier: NCT04828382 |
Recruitment Status :
Recruiting
First Posted : April 2, 2021
Last Update Posted : January 30, 2023
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Condition or disease |
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Pregnancy Related Cystic Fibrosis |
Advances in medical treatment, including the use of highly effective CFTR modulators have greatly increased life expectancy in women with CF, but the effects of pregnancy on women with CF are yet unknown. It is anticipated that over 90% of the CF population will be on CFTR modulators in the next few years. More knowledge about the effects of CFTR modulators in pregnancy is needed.
This is a prospective, multi-center, observational study to follow pregnant women with CF, conducted at 40 US sites. Women are enrolled in the first trimester of pregnancy and assessed every 3 months during pregnancy and during the first year after delivery, then every 6 months for an additional year. Changes in lung function over the course of pregnancy will be evaluated based on cumulative CFTR modulator use while pregnant while accounting for other factors that may influence changes in pulmonary function: baseline lung function, genotype, history of exacerbations, and pre-existing co-morbid conditions.
Study Type : | Observational |
Estimated Enrollment : | 285 participants |
Observational Model: | Cohort |
Time Perspective: | Prospective |
Official Title: | A Prospective Study Evaluating Maternal and Fetal Outcomes in the Era of Modulators |
Actual Study Start Date : | September 30, 2021 |
Estimated Primary Completion Date : | December 30, 2025 |
Estimated Study Completion Date : | December 30, 2025 |

- Forced expiratory volume at one second (FEV1) percent predicted after delivery and restart of modulators [ Time Frame: 42 weeks ]Change in FEV1 percent predicted after delivery and restart of modulators relative to measures assessed prior to pregnancy
- Forced expiratory volume at one second (FEV1) percent predicted after delivery [ Time Frame: 42 weeks ]Change in FEV1 percent predicted after delivery relative to measures assessed prior to pregnancy
Biospecimen Retention: Samples Without DNA

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Ages Eligible for Study: | 16 Years and older (Child, Adult, Older Adult) |
Sexes Eligible for Study: | Female |
Accepts Healthy Volunteers: | No |
Sampling Method: | Non-Probability Sample |
Inclusion Criteria:
- Pregnant, intending to continue pregnancy, enrolled in the Cystic Fibrosis Foundation Patient Registry (CFFPR)
Exclusion Criteria:
- None

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): NCT04828382
Contact: Natallia Cameron, MS | 206-884-7550 | natallia.cameron@seattlechildrens.org | |
Contact: Anna Mead | 206-884-7531 | anna.mead@seattlechildrens.org |

Principal Investigator: | Raksha Jain, MD | University of Texas | |
Principal Investigator: | Jennifer Taylor-Cousar | National Jewish |
Responsible Party: | Amalia Magaret, Director of Statistical Research, Seattle Children's Hospital |
ClinicalTrials.gov Identifier: | NCT04828382 |
Other Study ID Numbers: |
MAYFLOWERS-OB-20 |
First Posted: | April 2, 2021 Key Record Dates |
Last Update Posted: | January 30, 2023 |
Last Verified: | January 2023 |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Pregnancy/obstetric health in women with cystic fibrosis Pregnancy CFTR modulators Cystic Fibrosis |
Cystic Fibrosis Fibrosis Pathologic Processes Pancreatic Diseases Digestive System Diseases |
Lung Diseases Respiratory Tract Diseases Genetic Diseases, Inborn Infant, Newborn, Diseases |