The relevant content of pig ovulation period is as follows:

Pig ovulation usually occurs on the 14th day of the menstrual cycle. At this time, the pig's ovaries begin to secrete large amounts of eggs, and these eggs mature within 24 hours.

These symptoms of ovulation in pigs include:

- Pigs may become excited and show increased sexual desire.

- Pigs may show increased appetite and be more willing to eat.

- Pigs may experience an increase in body temperature and may show some discomfort.

The ovulation period of pigs is very important if they want to reproduce. At this time, the pig needs to mate with another pig in order to pass the sperm to the other pig to complete reproduction.

The symptoms of ovulation in pigs are similar to humans. If humans are trying to reproduce, they may exhibit similar symptoms on certain days during their menstrual cycle.