ARTWORK, BIOLOGY, BLEEDING, BLOOD, CELL, CELLS, CERVIX, CONCEPTS, CONCEPTUAL, CYCLE, DESIGN, DISEASE, ENDOMETRIOSIS, ENDOMETRIUM, FEMALE, FETUS, FLOW, GYNAECOLOGY, HEALTHCARE, HORMONES, ILLUSTRATION, IRREGULAR, MEDICAL, MEDICINE, MENSES, MENSTRUAL, MENSTRUATION, MONTHLY, NO-ONE, NOBODY, OVARY, PAINFUL, PERIOD, PERIODICITY, PINK, PREGNANT, REGULAR, REPRODUCTIVE, UTERINE, UTERUS, VAGINAL, WOMAN,