Thanks for the query,
After vaginal delivery, Lochia lasts for about 3-4 weeks where the dead and sloughed off endometrium is shed. The healing of an episiotomy wound, if given, would take about 3-4 weeks as well. So the best time would be after a month from the date of delivery ideally when her body would have recouped well and her vaginal muscles would have almost returned to her pre-pregnant state.
I hope i have answered your query in detail,
Wishing good health,
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