Sexing Your Pig
DETERMINING THE SEX OF YOUR SPECIMEN
Males are identified by the presence of a urogenital opening just posterior to the umbilical cord as shown in the left panel below. Depending on the age of the pig it may be possible to see or feel the penis as it passes towards this opening. Males also possess a pair of scrotal swellings at the posterior end that can help in identification.
In contrast to males, the urogenital opening in females is immediately ventral to or below the tail and anus. This opening is also marked by a fleshy tubercle called the genital papilla as shown in the right panel at left. The presence (or absence) of a genital papilla is probably the most straight-forward way for you to determine the sex of your specimen.