Responsa על כתובות 119:17

Q. How long should a nursing widow wait until she can remarry?
A. The accepted law is that she must wait 24 moon-months (from the day the child is born), i. e. months of alternating length of 29 and 30 days. If one of the years is a leap year, she must wait 25 such months. However, were I not afraid to differ with the decisions of my teachers, I would require her to wait 24 full months of 30 days each, or 720 days, and in a leap year 25 moon-months of alternating length, in order to be sure to comply with all possible interpretations of the opinions of the authorities of the Talmud.
This Responsum is addressed to R. Yekutiel.
SOURCES: Pr. 79. Cf. Mord. Yeb. 19; Israel Bruno, Responsa 192; ibid. 193; ibid. 194; Terumat Hadeshen 216; Isserlein, Pesakim 82; ibid. 178.

Q. How long should a nursing widow wait until she can remarry?
A. The accepted law is that she must wait 24 moon-months (from the day the child is born), i. e. months of alternating length of 29 and 30 days. If one of the years is a leap year, she must wait 25 such months. However, were I not afraid to differ with the decisions of my teachers, I would require her to wait 24 full months of 30 days each, or 720 days, and in a leap year 25 moon-months of alternating length, in order to be sure to comply with all possible interpretations of the opinions of the authorities of the Talmud.
This Responsum is addressed to R. Yekutiel.
SOURCES: Pr. 79. Cf. Mord. Yeb. 19; Israel Bruno, Responsa 192; ibid. 193; ibid. 194; Terumat Hadeshen 216; Isserlein, Pesakim 82; ibid. 178.