To what extent is a prior intention obligatory for a woman to fast the missed days of Ramadan, and should the intention be for each day individually or combined for a number of days, and what is the ruling for one who breaks her fast on a day in the middle of a combined intention?

The majority of scholars (Hanafi, Shafi'i, and Hanbali schools) stipulate a separate intention for each day of Ramadan, while the Maliki school and one narration from Ahmad hold that a single intention suffices for the entire Ramadan and similar continuous fasts. The correct view is that an intention must be formed during the night for each day. And whoever begins an obligatory fast is not permitted to break it without a valid excuse; otherwise, he incurs sin and must make up for the missed fast.