Bleeding after a miscarriage

If the limbs of the foetus were not formed then if the blood flowed for three days or more it would be regarded as haidh provided there was fifteen days or more that passed from the last haidh. The woman will follow her previous menstruating cycle. E.g. If she was used to bleeding for five days and she now bled for over ten days, five days will be regarded as haidh and the remainder days as istihaadhah. If the limbs of the foetus were formed, then the bleeding will be regarded as nifaas.

And Allah Ta'ala knows best.