The vaginal microbiome changes as a female matures because
A. most sexually mature women use douching as a means to eliminate the vaginal microbiome.
B. hormonal changes and sexual activity alter the environment of the vagina.
C. episodic treatments with antibiotics for UTIs and antifungals for vaginitis eliminate many of the normal microbiota.
D. estrogen has an antibiotic effect on the vaginal microbiome.
Answer: B
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