Effect of COVID-19 mRNA Vaccine on Semen Parameters

Effect of COVID-19 mRNA Vaccine on Semen Parameters - Effect of COVID-19 mRNA Vaccine on Semen Parameters

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000044332

Enrollment

Registered

2021-05-26

Start date

2021-05-15

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Male infertility

Interventions

None listed

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: 1. Male Volunteers 2. Ages 20-50 3. Unvaccinated at the time of enrollment. Vaccinate with the first and second Pfizer's COVID-19 Vaccine from May to December 2021. 4. Able to supply semen samples 8 times in total as scheduled. 5. Submission of signed informed consent with ability and willingness.

Exclusion criteria

Exclusion criteria: 1.Taking medications that would interfere with semen analysis parameters. 2.History of COVID-19 infection at the time of enrollment. 3.Not eligible to receive COVID-19 mRNA vaccination due to health factors.

Design outcomes

Primary

Measure	Time frame
Semen Analysis Time Frame: 1)Before the first mRNA COVID-19 vaccine (2 times) 2)2 weeks after the first COVID-19 vaccine (2 times) 3) 2 weeks after the second COVID-19 vaccine (2 times) 4) 4 weeks after the second COVID-19 vaccine (2 times) * 2 days of abstinence period before semen collection	—

Countries

Japan

Contacts

Public ContactTomomoto Ishikawa

Reproduction Clinic Osaka Reproduction Clinic Osaka

tishikawa@reposaka.jp06-6136-3344

Outcome results