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COVID-19 Vaccines and the Menstrual Cycle

COVID-19 Vaccines and the Menstrual Cycle; a Cross-sectional Study

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT05688995
Enrollment
617
Registered
2023-01-18
Start date
2021-09-30
Completion date
2023-01-01
Last updated
2023-01-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Menstrual Irregularity

Brief summary

The study aimed to explore the effect of different COVID-19 vaccines on menstrual cycle

Detailed description

This is a descriptive cross-sectional study that took place between September 2021 and December 2021. The study aimed to explore the effect of different COVID-19 vaccines on menstrual cycle. It used an anonymous questionnaire distributed via social media platforms; Facebook, Twitter, and WhatsApp across different cities of Jordan. A total of 732 responses were received with a 59% response rate. The questionnaire was distributed over four months directed at women who have received at least one dose of the COVID-19 vaccine and who live in Jordan. It took 10 minutes to complete all the questions. Data collection did not involve direct contact with participants to prevent the spread of COVID-19.

Interventions

BIOLOGICALNaser Al-Husban

COVID-19 vaccines

Sponsors

University of Jordan
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
CROSS_SECTIONAL

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 40 Years
Healthy volunteers
Yes

Inclusion criteria

* 18 years and older * less than 40 years * healthy women * received covid-19 vaccine

Exclusion criteria

* women who did not receive the vaccine * those living outside Jordan (those cannot fill the form) and during analysis.

Design outcomes

Primary

MeasureTime frameDescription
significant changes in the menstrual cycle after vaccination6 monthschanges that involve bleeding amount or pain

Countries

Jordan

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026