Final answer:
The reference material provided does not address the typical shape of the sow's cervix; however, the sow's cervix is generally characterized by its corkscrew shape, which is unique to pig species and facilitates breeding.
Step-by-step explanation:
The typical shape of the sow's cervix in the reproductive system is not described in the provided reference material, which focuses on the human female reproductive system.
However, for a general understanding, the cervix in female mammals, including sows, is the lower part of the uterus that serves as a passageway connecting the uterine cavity with the lumen of the vagina.
In sows, the cervix is known for its distinctive corkscrew shape, which matches the boar's similarly shaped, ensuring successful breeding.