We investigated perceived effects of the hormonal cycle on female classical singing students. Singers completed a questionnaire and daily diary that assessed singers physical symptoms, mood states and vocal production in the first and third months of the study. 81% female singers reported regular menstrual cycles and 43% reported using an oral contraceptive; neither of these factors was related to voice quality variables measured on the first day of the cycle. Singers not taking a contraceptive pill rated their voice quality lower and their mood higher than those on the pill. Perceived voice...