I think the main concern is for the unborn children. MI alone isn't a reason alone to not have children. However, if the MI makes daily functioning and stability difficult, then yes, the decision to have children should be considered carefully. I had an online friend a few years ago who ultimately gave up on having her own children because she couldn't maintain stability without powerful medications and the more "safe" ones destabilized her. (She saw a psychiatrist who specialized in treating pregnant or wanting to become pregnant women.) MI does make having kids more difficult. I really do think it should be a decision that isn't taken lightly. Many drugs can cause birth defects. Some drugs are on the market for a number of years before certain birth defect issues are detected. Sort of why being as med free as possible when having kids is very important (but many people don't know this as they get drugs from a GP who doesn't know much of anything about psychiatric drugs).