Ventral placentation refers to a specific type of placentation in which the ovules (matured eggs) are located on the ventral (lower) side of the ovary. This term can be synonymous with several other terms, including "marginal placentation," "parietal placentation," and "axile placentation." Marginal placentation means the ovules are attached to the margin of the ovary. Parietal placentation means the ovules are attached to the ovary wall. Axile placentation means the ovules are attached to an axis centrally within the ovary. While the terms may vary, the concept remains the same: the location of the ovules within the ovary.