If it helps to know this... I have a child. She's almost 19 now. Despite - maybe because I went back to work part time, and she had a childminder, and the fact that she grew up in a dysfunctional family (her dad has mental health issues, although he won't acknowledge them) she has grown up to be a healthy, balanced, intelligent and sensible young woman.
She's very popular as a confidante for her friends, maybe because she has a good insight into mental health; her best friend at school suffered from paranoid schizophrenia and Katherine was the only person she trusted when in the grip of it.
S, I'd say motherhood and bpd aren't necessarily mutually exclusive; despite my fears I found it surprisingly easy to show her the unconditional love I felt I'd been denied by my own mother.