The sample comprised 31 female undergraduate students attending a private University in João Pessoa, northeastern Brazil. The inclusion criteria were: age between 19 and 35 years, heterosexual, active sex life, living in a stable relationship for at least 6 months no pregnancy or parturition in the last 6 months, clinically healthy and agreeing with the terms for participating in the study. All participants gave their informed consent to take part in the study.