When to announce after a miscarriage?

Holly
This is my third pregnancy, one healthy and beautiful 2 year old and one miscarriage in August. I'm about to burst to tell my mom but my husband says no, we need to wait. I see where he is coming from after the last time. We told our family and close friends about our pregnancy last time even though we knew we would lose the baby, their support helped get me through it. Should I go ahead amd tell my mom? Or respect my hubby and wait until he's ready?