Final answer:
The ovarian ligament is the structure that connects the ovary to the lateral portion of the uterus, playing an integral role in the support of the female reproductive organs.
Step-by-step explanation:
The ligament that connects the ovary to the lateral portion of the uterus is known as the ovarian ligament. This ligament is crucial for maintaining the proper position of the ovaries in relation to the uterus.
The ovarian ligament is part of a network of structures that support the female reproductive organs, including the broad ligament, which extends laterally from both sides of the uterus, and the uterosacral ligament, which stabilizes the uterus posteriorly by connecting the cervix to the pelvic wall.