How to deal when it runs in the family?

Both my sister and my grandma on my mom’s side have BPD. They act extremely alike and it’s honestly gut-wrenching.

My mom and I are the opposite of them, we’re relatively normal and have led decent lives with good relationships and stability.

I have a baby daughter now. I’m so scared she’s gonna end up like my sister and grandma - no friends, paranoid that everyone is out to get them, aggressive, imploding their nuclear families by destroying their own relationships with husbands and their kids, jumping from a million different jobs constantly, the neverending lies.

How can I make sure my baby never ends up like this even if she has been unlucky enough to get the BPD gene?