I was wondering how often a sow comes into heat. My sow her name is hilda she is about 6 1/2 months old she camein and out of heat(boy is it short) , I put her and my boar together in the pen. I am very doubtfull that he was able to do the deed see he seemed to be a little too short. Hilda is taller then he is. I really dont think breed would have anything to do with this but he is a blue butt and she is a hamshire. But I am asking how often they come in heat because if he didnt get the deed done then I have to sell him and go with A.I. By the way hilda was a pet for me that is why she has a name I had two others I raised for the freezer and I really missed them so my husband got me her along with two others the boar and one for the freezer.