Figure 10.1 shows four pictures of the external anatomy of the fetal pig. The first panel in a female. Highlighted is the umbilical cord, the mammary papilla and the anus. The second panel is a male. Highlighted in this image is the umbilical cord, the male urogenital opening, the and the scrotum. The next panel shows a close up of the female genital papilla anterior to the anus. The final panel shows the close up of the male scrotum anterior to the anus.

• To determine the sex of the fetal pig, first locate the anus which is located ventral to the tail.
• If the fetal pig has a small opening just ventral to the anus, and a fleshy protuberance just above the opening, then the pig is a female.
• If the fetal pig has an opening just posterior to the umbilical cord and a sac-like scrotum near the anus, the pig is a male.
• Use Figure 10.1 to help you distinguish the sex of a pig.
• Note that both male and female pigs have  one urogenital opening and one anal opening.
• The urogenital opening is a common opening for the urinary system and the reproductive system.
• Also note that both male and male pigs have mammary papilla.