Halakhah do Przysłów 14:10

A woman who has given birth¹²Sedei Chemed writes that a woman who has suffered a miscarriage is in the same category as one who gave birth. (Ibid 617 Biur Halachah) or a person who is critically ill, with regard to eating, drinking and the desecration of Yom Kippur, are governed by the same Halochos that apply in the case of desecration of Shabbos. (see chapters 92 and 93 above) However, with regard to eating and drinking, even if several doctors say that the patient is not required [to take food,] and even if they say that eating and drinking will be harmful to him, but the patient says that he does require food, and even if he says that his life is not yet in danger, but if he does not eat, his sickness will get worse, and his life will be threatened, you should obey his wishes¹³Before giving him food, he should be reminded that it is Yom Kippur for he may have forgotten. (Ibid 618, Mishnah Berurah 5) and give him food; for in regard to food and drink he is the best judge of his own condition, [as it is written, (Proverbs 14:10)] "The heart knows its own bitterness."