Yom Kippur Fast - Low Iron During Pregnancy

My wife is in her fourth month of pregnancy. She had a blood test on Wednesday, and her iron level is low: with a range of 187-300, she has 208. The test required not taking the supplement containing iron from the beginning of the week, and since yesterday she started taking it again. Should she fast, or is another examination needed?

Hello 

She can begin to fast. 

If there is severe weakness manifested by severe dizziness, blackouts in the eyes, etc., she should drink in measured amounts. 

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