When is it permissible to have intercourse with one's wife after a miscarriage of a pregnancy less than a month old, with bleeding lasting a week and a half to two weeks, and then stopping?

The blood a wife sees is considered istihadah (irregular vaginal bleeding), except for what coincides with the period of her regular menses, in which case it is hayd (menstrual bleeding). It is permissible for a husband to have intercourse with his wife during istihadah according to the majority of scholars, and it is impermissible during hayd by consensus. If it is permissible to have intercourse with her while the istihadah blood is flowing, then it is even more so permissible after it has ceased.