physiological; physical; visceral; instinctive; in one's guts
physiological phenomenon; physiological response
menstrual pain; period pain
sanitary-protection products (e.g. sanitary napkins, tampons); sanpro
physiological saline; normal saline; saline solution
physiological function; physiology
menstrual irregularity; irregular periods
days of one's menstrual period
biologically active substance
sanitary shorts; period panties; sanitary panties
period poverty; menstrual poverty