evidence: Although HPV vaccines have not been linked to causing adverse pregnancy outcomes or side effects (adverse events) to the developing fetus among pregnant people vaccinated inadvertently, HPV vaccines have not been studied in pregnant people in clinical trials. [...] HPV vaccines are very safe. Scientific research shows the benefits of HPV vaccination far outweigh the potential risks. Like all medical interventions, vaccines can have some side effects. [...] Adverse Reactions - The most common adverse reactions reported during clinical trials of HPV vaccines were local reactions at the site of injection.