Social & Preventive Medicine The Standard Days Method (SDM) advices on avoiding unprotected sexual intercourse: A From day 3 to 13 of menstrual cycle. B From day 8 to 28 of menstrual cycle C From day 8 to 21 of menstrual cycle D From day 3 to 19 of menstrual cycle 💡 Explanation The Standard Days Method (SDM) advices on avoiding unprotected sexual intercourse: ✓ Correct Answer: C. From day 8 to 21 of menstrual cycle