Male Reproduction COVID Sequelae Study (MARCOS).

Corona Virus Disease 19 (COVID-19) Vaccine and Impact on Fertility Study

The purpose of this study is to investigate the effects of COVID-19 Vaccination on semen parameters and to determine how long these possible changes may last following vaccination.

Inclusion Criteria:

1. Receiving COVID-19 vaccines
2. Male age 18-50 years old

Exclusion Criteria:

1. Adults unable to consent
2. Women
3. Prisoners
4. Men who have been receiving Testosterone replacement therapy or anabolic steroids within the last year
5. Men with a history of Azoospermia
6. Men with a genetic or other medical condition known to be associated with decreased semen parameters (i.e. Klinefelter's syndrome, Y-Chromosome Microdeletion (YCMD), post-chemotherapy treatment, etc.)
7. Positive COVID-19 test within the last 3 weeks