How many months after estrus can a sow become pregnant?

Patient's question:

No

Doctor's answer:

The gestation period of a sow is about 115 days. Sows must reach 6 months of age and weigh more than 80 kilograms before mating.
The estrous period of a sow: The estrous cycle of a sow is 18-24 days, averaging 21 days.