If the fasting person takes an injection during the day of Ramadan?

A woman over fifty years old has not had her period for three years, and a month ago she saw blood for three days. Is it menstruation or irregular bleeding?

What if the fasting person takes a blood sample for laboratory tests or donates blood during the day of Ramadan?

They say that if the fetus reaches 81 days and is miscarried, its creation is established and the woman is in postpartum bleeding. Is this statement correct?

What if a fasting person uses kohl during the day of Ramadan?

She had an IUD placed, and her menstruation extends for more than ten days. How should she calculate her menstrual days?

If a fasting person uses eye drops or ointment during the day in Ramadan?

Her menstrual period lasts more than 10 days, and she followed the Hanafi jurisprudence that she should perform ghusl after 10 days. However, this time her period lasted 8 days with spotting, then one time there was a lot of blood. On day 11, she came to perform ghusl and found a lot of blood. Is this considered menstruation or irregular bleeding, and should she pray?

If the fasting person eats what is between his teeth?