The Talmud describes conception as a partnership of three: the father, the mother, and the Holy One — each contributing distinct elements to the human form, underscoring the sacred and divine dimension of fertility.
תָּנוּ רַבָּנַן: שְׁלֹשָׁה שׁוּתָּפִין יֵשׁ בָּאָדָם — הַקָּדוֹשׁ בָּרוּךְ הוּא, וְאָבִיו, וְאִמּוֹ. אָבִיו מַזְרִיעַ הַלּוֹבֶן, שֶׁמִּמֶּנּוּ עֲצָמוֹת, וְגִידִים, וְצִפׇּרְנַיִם, וּמוֹחַ שֶׁבְּרֹאשׁוֹ, וְלוֹבֶן שֶׁבָּעַיִן. אִמּוֹ מַזְרַעַת אוֹדֶם, שֶׁמִּמֶּנּוּ עוֹר, וּבָשָׂר, וּשְׂעָרוֹת, וְשָׁחוֹר שֶׁבָּעַיִן. וְהַקָּדוֹשׁ בָּרוּךְ הוּא נוֹתֵן בּוֹ רוּחַ, וּנְשָׁמָה, וּקְלַסְתֵּר פָּנִים, וּרְאִיַּית הָעַיִן, וּשְׁמִיעַת הָאוֹזֶן, וְדִבּוּר פֶּה, וְהִלּוּךְ רַגְלַיִם, וּבִינָה, וְהַשְׂכֵּל.
§ The Sages taught: There are three partners in the creation of a person: The Holy One, Blessed be He, and his father, and his mother. His father emits the white seed, from which the following body parts are formed: The bones, the sinews, the nails, the brain that is in its head, and the white of the eye. His mother emits red seed, from which are formed the skin, the flesh, the hair, and the black of the eye. And the Holy One, Blessed be He, inserts into him a spirit, a soul, his countenance [ukelaster], eyesight, hearing of the ear, the capability of speech of the mouth, the capability of walking with the legs, understanding, and wisdom.