Should we have another baby ?

Me and my wife have been married 11 years we have 3 kids 2 are mine from a previous marriage and a relationship. She got pregnant last year but she had a miscarriage at 3 1/2 months. She has an IUD in the doctor said it was the reason for the misscarige. Our son will be 8 in a few weeks our other sons are 26 he moved out lives with his partner our other son is 22 he has disabilities still lives at home but he has a job he’s hardly ever home. Our youngest son was really upset when we told him we lost his baby sister last year he’s always was wanting a little brother or sister my wife was hurt even more she’s been talking a lot about having another one but she’s not sure if she can. She still can’t get over our unborn daughters death. It’s been over a year. I’m 44 she’s 25. Should we have another baby ?