QUOTE- "Research indicates that pathogens are able to survive in sperm, so a father can pass these bacteria to his child at the moment of conception.2) This may explain why, according to some anecdotal reports, females who have experienced multiple miscarriages have successful pregnancies after changing partners.3) Given its key role in innate immune function, the existence of the VDR in sperm also suggests that sperm are susceptible to infection."
QUOTE- "Research indicates that L-form bacteria are able to survive in sperm, so a father can pass these pathogens to his child at the moment of conception. Evidence is also growing that L-form bacteria and other pathogens are able to cross the placental barrier – meaning they can be passed from a pregnant woman to her fetus."
Source- https://mpkb.org/home/pathogenesis/transmission