Ключевые слова: background, birth, calendar, care, caution, closeup, concept, contraception, contraceptive, control, counting, cycle, days, estrogen, healthcare, hormones, isolated, lifestyle, medical, medication, medicine, menstruation, month, monthly, ovulation, period, pharmaceutical, pharmacology, pharmacy, pill, precaution, pregnancy, prescription, prevention, progesterone, protect, protection, protective, regulate, reproduction, safe, safety, schedule, sex, sexual, tablet, weeks,