Well I think it is exciting that you are considering having a child.
Having a child when you are bipolar is like doing anything else when you are bipolar. We have our own personal challenges with that. I get very stressed when I have not had enough sleep. So going through childbirth and then the years of sleepless nights did take a toll on me. You have to stay up all night when they are sick, even if they are not until they get old enough you don't sleep much, depends on the baby. So that is very demanding. If you have a husband who can help you at night that is great, but a lot of times they need sleep to get up for work, so you end up doing it.
As far as being a good parent, I think I am a good parent, was unstable from time to time, but children are loving and forgiving, and know I am a great grandparent.
Know this may sound odd, but I think I was more engaged with my child as my thinking can be magical and was able to really get on the floor and play and had a lot of fun.
Children have "moody" behavior as they are unable to express themselves yet, and I personally think we are more in tune with that, as that is our lives, and it can make us an excellent and supportive parent.