Rabban Gamliel says: Three women may knead at the same time and bake in the same oven, one after the other. But the Sages say: Three women may be occupied with dough [simultaneously]: one kneads, another shapes, and a third bakes.  R' Akiva says: Not all women and not all kinds of wood and not all ovens are alike.  This is the general rule: If [the dough] rises let her wet it with cold water.