א שמשהין עצמן בבטן כדי שיזריעו נשותיהן תחלה שיהו בניהם זכרים מעלה עליהן הכתוב כאילו הם מרבים בנים ובני בנים והיינו דאמר רב קטינא יכולני לעשות כל בני זכרים אמר רבא הרוצה לעשות כל בניו זכרים יבעול וישנה
1 they contained themselves during intercourse<span class="x" onmousemove="('comment',' Lit., in the belly'. ');"><sup>1</sup></span> in order that their wives should emit their semen first so that their children shall be males, Scripture attributes to them the same merit as if they had themselves caused the increase of the number of their sons and sons' sons. This explains what R. Kattina said, 'I could make all my children to be males'. Raba stated: One who desires all his children to be males should cohabit twice in succession. R. Isaac citing R. Ammi<span class="x" onmousemove="('comment',' Var. lec. Assi ('En Jacob). ');"><sup>2</sup></span> further stated: A woman conceives only immediately before her menstrual period, for it is said, Behold I was brought forth in iniquity;<span class="x" onmousemove="('comment',' Ps. LI, 7. The last word is taken as an allusion to the menstruation period when intercourse is an iniquity' and the prefixed beth ('in') is rendered 'near'. ');"><sup>3</sup></span> but R. Johanan stated: A woman conceives only immediately after her ritual immersion, for it is said, And in cleansing<span class="x" onmousemove="('comment',' E.V., 'sin'. ');"><sup>4</sup></span>