BismilLaahir Rahmaanir Raheem.

Allah says;
"The month of Ramadhan in which was revealed the Quran, a guidance for mankind and clear proofs for the guidance and the criterion (between right and wrong). So whoever of you sights (the crescent on the first night of) the month (of Ramadhan i.e. is present at his home), he must observe Sawm (fasts) that month, and whoever is ill or on a journey, the same number [of days which one did not observe Sawm (fasts) must be made up] from other days. Allaah intends for you ease, and He does not want to make things difficult for you. (He wants that you) must complete the same number (of days), and that you must magnify Allaah [i.e. to say Takbeer (Allaahu Akbar: Allaah is the Most Great)] for having guided you so that you may be grateful to Him”[al-Baqarah 2:185].

We've learned from this verse that fasting is Fard upon us all. It's a blessings from Allah not a burden as many see it. We've also learned that whoever is ill or on a journey and cannot fast due to difficulties you faces on your journey or in your illness, then you can break your fast then fast after Ramadhan to cover your days missed. Same to our sisters going through their monthly cycle or after childbirth.

Please Note that you cannot feed the poor to cover for your missed Ramadhan days. Only old age people who cannot fast due to weakness and those with permanent illness such as stomach cancer etc can feed the poor full day meal equivalent if doctors says no chance of recovery to be able to fast your missed days. If you feed for whatever reason you could not fast, you must still fast the missed days as soon as you can fast again. Fasting in Ramadhan is so superior that even those sisters who could not fast due to their monthly/childbirth cycle has to still fast their missed days not like daily salaat which Allah has spared them not to pay back the missed salaat. Allahu Akbar. To be continued in shaa Allah. May Allah count us among those who are successful in this coming blessed month. Aameen.