Multiple choice The incubation period of syphillis is 14 to 28 days 6 to 12 days 28 to 41 days 18 to 25 days Reveal answer Fill a bubble to check yourself A Correct answer Explanation The incubation period for primary syphilis typically ranges from 10 to 90 days, with an average of about 21 days. Among the provided choices, 14 to 28 days is the most clinically accurate representation of this window.