Responsa for Yevamot 141:18
אלא זכריו דאיתנהו בשעת אכילה וליתנהו בשעת עשיה היכי משכחת לה לאו דאתילוד בין עשיה לאכילה ש"מ ערלות שלא בזמנה הויא ערלות
How is it possible, however, that a person's male children should be in existence during the eating and not during the preparation? Obviously only when birth occurred in the interval between the preparation and the eating.<span class="x" onmousemove="('comment',' I.e., on the same day. viz., on the fourteenth of Nisan, the Passover Eve. ');"><sup>61</sup></span> Thus it may be inferred that uncircumcision in the pre-circumcision period<span class="x" onmousemove="('comment',' The child being only one day old (v. supra n. 24). ');"><sup>62</sup></span> constitutes a legal status of uncircumcision.<span class="x" onmousemove="('comment',' The answer to R. Hama's enquiry is consequently in the negative. ');"><sup>63</sup></span> Said Rabbah:<span class="x" onmousemove="('comment',' Cur. edd., 'Raba'. ');"><sup>64</sup></span>