Likutei Moharan 48:2/ליקוטי מוהר"ן מ״ח:ב׳

12. Because of this, sukkah —i.e., energetic prayer—is a preternatural aid for having children. This is why Sukkot is immediately followed by Shemini ATZeReT; for the Female OTZeReT (retains) and absorbs the drop so that She does not miscarry.

2And this is the aspect of “You sukeini (sheltered me) in my mother’s womb”—i.e., the aspect of sukkah is turned into an aspect of pregnancy. Because of this, Chanah prayed “upward to God” (1 Samuel 1:10). “Al < YHVH>,” in that she is an aspect of sukkah.

3{“Behold, children are the heritage from God; the fruit of the womb, a reward” (Psalms 127:3).} The Land of Israel, too, is a preternatural aid for having children, as our Sages taught: “Go forth from your native land” (Genesis 12:1) —and there, you will merit children (Rosh HaShanah 16b). For “children are the heritage from God.” And this is because “the fruit of the womb, a reward” is the reward for sukkah, corresponding to “You sukeini in my mother’s womb.”

4For, in essence, the Land of Israel is the result of “His koach works,” as in, “His koach works, to give them the heritage [of the nations].” And this koach is an aspect of sukkah, “All my bones will say”; an aspect of “You sokhekheini of bones and sinews”; and of “I put My words in your mouth and with the shade of My hand I covered you.”