Expiry date on the IUCD package refers to?

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E6 Obstetrics Williams p. 73-95
E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart C (pp 404-604 of 604) p. 190-192
Practise the full Hariyana-CHO-2021
Attempt every question from this paper in a timed mock, then review the full solution for each one.