Why were all the patriarchs barren because God desires their prayers, except Jacob—did God not desire Jacob’s prayer?

This source-based Torah study examines: Why were all the patriarchs barren because God desires their prayers, except Jacob—did God not desire Jacob’s prayer? It follows the canonical Hebrew discussion through the parasha and classical Jewish sources. This localized discovery layer is a concise summary rather than a full translation of the article; practical, halakhic, medical, legal, historical, mystical or empirical claims remain source-framed and subject to the canonical review status.