What should a woman in postpartum bleeding (nifas) do if she is unable to make up the fast of Ramadan?

If you are unable to make up for the missed Ramadan fasts before the next Ramadan due to illness, then there is no expiation required for this delay. The obligation to make up the fasts remains upon you until you are able to. However, if your inability to fast is continuous throughout the year, then you are obliged to feed one poor person for each day of Ramadan for the rest of your life. The assessment of this inability is to be determined by a specialized doctor.