May an infant born possibly in the eighth month (doubtful viability) be circumcised on Shabbat?
Synopsis
An infant born at eight months is presumptively non-viable (nefal) and its bris does not override Shabbat. If there is doubt whether it is a seven- or eight-month infant, the Mechaber prohibits circumcision on Shabbat; however, the Rema (citing later authorities) holds that doubtful cases may be circumcised on Shabbat.
More in Assisting Childbirth on Shabbat
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Discussion
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