Age a factor?

Joanne • 33yrs old.. married to my king.. mother of 1 ttc #2
I'm 33 with one 11 year old son my husband is 52 with four children of his own youngest being 14 is it possible that age can be a factor in not getting pregnant we were married in December but we've been trying to conceive for a year.. he is very active and healthy.. aside from the number there really is nothing 52 about him could could it be me where he has four children and I only one?