Our pigs do not generally become fertile until about eight months of age and then the gilts generally first farrow at one year. Every once in a while out the the hundreds of pigs we have out on our pastures I'll a Lolita, a gilt that will get pregnant as early as six months but that is rare and not a big deal. We keep boars and gilts together. They like the company and fair better together.
Cheers,
-Walter Jeffries
Sugar Mountain Farm
Pastured Pigs, Sheep & Kids
in the mountains of Vermont
http://SugarMtnFarm.com/