Is it necessary to make up for missed prayers after stopping praying due to the onset of spotting following a threatened miscarriage?

The preponderant opinion is that a pregnant woman does not menstruate, and the blood she sees is istihada (non-menstrual bleeding), not hayd (menstrual bleeding). Therefore, she is obligated to pray and fast. She must also take precautions [against the blood flow] and perform wudu (ablution) for every prayer after its time has begun. It is more cautious for her to make up the prayers she missed during that period.