If doctors say that you will recover and be able to fast, you must not  give Fidyah and you must wait until you recover and able to fast and  make up you r missed days. But if they say that you will never be able to fast, you may feed the  poor in your Muslim country.

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If the period started before magheeb adhan then your fasting is not valid for that day.

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This is up to you. You can skip these days and make them later on if you fear for your safety or the safety of the pregnancy.

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