All of the following mechanisms might account for a reduced risk of upper genital tract infection in users of progestin releasing IUDs, except:
A. Reduced retrograde menstruation
B. Decreased ovulation
C. Thickened cervical mucus
D. Decidual changes in the endometrium
Correct answer : B. Decreased ovulation
Factors decreasing risk of upper genital tract infection in users of progestin releasing intrauterine contraceptive device:
Reduced retrograde menstruation – prevents seeding of fallopian tube with bacteria
Thickened cervical mucus – decreases bacterial penetration
Decidual changes in the endometrium – making it less susceptible to infection