Shulchan Arukh Orach Chayim · Siman 617

English

“The laws concerning a pregnant woman, and one who nurses a child, and giving birth on Yom Kippur” - Containing four paragraphs. Pregnant and nursing women fast completely on Yom Kippur.

English

A pregnant woman who smells (food and her face changes even though she did not say “I need it”) we whisper in her ear that it is Yom Kippur and if she quiets down when this is mentioned it is fine, but if not, then we feed her (until) she is satisfied.

English

Every person who smells food and his face changes (its color) and he is in danger if they do not give him from it (the food which he smells), we feed him from it (the food).

English

A woman who gives birth must not fast at all within three days (of giving birth). From three until seven (days), if she says, “I have to eat,” feed her. From now on (after seven days), behold she is like every other person. And we do not count these as twenty-four hour days, for example if she gives birth in the evening of the seventh of Tishrei, we do not feed her on Yom Kippur (the tenth day of Tishrei) if she does not say, “I need it (food),” even though the three days were not completed for her until the evening of Yom Kippur, since (Yom Kippur) begins the fourth day after her giving birth, this is called after three days. (Yom Kippur here is counted as the fourth day after her giving birth.)