Persistence of spermatozoa: lessons learned from going to the sources

- The literature shows that sperm persists no longer than 7 days in the vagina post coitus.
- Two articles that cited sperm can persist for 17 and 19 days post coitus were found to be dubious.
- Scientists should use caution when citing studies that rely on self-reported data.
- Scientist should rely on primary sources when possible.