Study Guide Shabbat 135 Today’s shiur is dedicated by Miriam Tannenbaum with gratitude to the inspiring Daf Yomi women of RBS-Kehillat Ahavat Tzvion. "So grateful to have started this journey together and to continue even as we move to Efrat" and by Margie Zwiebel for a refuah shleima for Chaim Tzvi ben Yetta Bluma. In which situations does the mitzva of brit milah not override Shabbat? Beit Shamai and Beit Hillel disagree although it is not clear if their disagreement is regarding a child who is already born circumcised or a convert who was circumcised before converting. What is the status of a child born after eight months of pregnancy? Rabbi Asi connects (based on the connection in the verses of the Torah) between a woman who has impurity from birth for seven days after the birth of a male to the law of performed the brit milah on the eighth day. He therefore holds that a child born though caesarean section would get a brit milah immediately. Abaye disagrees. The gemara then shows that this debate was also a subject of debate for tannaim where Rabbi Chama and tana kama debate the status of slave children and in what situations do are they circumcised on the first day and in which ones on the eighth day? For the first thirty days of a baby's life, it is not clear if the baby will live - only when it reaches day 30 does it become clear. This is why the law of pidyon haben, redeeming the baby, is one the tthirtieth day. If that is the case, how can we do a brit milah on Shabbat on day eight if it's not clear the baby will live?