When to tell family the good news??

I was just wondering when some of you decided to tell immediate family (parents) the good news? Did you include siblings? Everyone else will definitely get the 3 month mark. I was thinking waiting till 8 weeks, after my first doctor appointment. My husband says we should sooner. I want to tell my parents because my mom would help me with any questions I have. I am also am reluctant at the same time because that small feeling that something could happen. Even though they’d support me through anything. I try to stay optimistic but all these forums really were an eye opener that things happen all too frequently.

When did you tell immediate family the big news?