Menstrual cycle, Endocrine system, Reproduction, Menstruation, Culture and menstruation, Premenstrual syndrome, Eutheria, Female reproductive system (human), Puberty, Mastodynia, Follicular phase, Follicle-stimulating hormone, Ovulation, Concealed ovulation, Luteal phase, Sexual intercourse, Calendar-based methods, Menstrual disorder, Anovulation, Hormonal contraception, Polycystic ovary syndrome, McClintock effect, Extended cycle combined hormonal contraceptive, Sanitary napkin, Tampon, Cloth menstrual pad, Menstrual cup