My cousin has a terrible disease that give brain tumors (non-cancerous) over and over until she dies. It's the same disease her mother died of when she was 4 or 5. It's very hereditary (50% chance), and, while docs are better at removing tumors without removing too much extra brain lately, and the tumors usually just sit there, the tumors grow like crazy in puberty and pregnancy.
So as you can imagine, we always told her from when she was farily young that she shouldn't have kids, as the act of being pregnant would likely kill her. Plus her kid might get the same disease and deal with that on top of having a dead mom. She eventually got her tubes tied, but not soon enough.
So, one day when she was around 20, she found out she was pregnant. She told her doc, and he was so anti-abortion that he tried to convince her she'd be ok and could have the baby! He lied to her from a position of trust and I blame him partially for what has happened since.
So, during pregnancy a brain tumor grew to grapefruit size and they rushed her straight from delivery into surgery. She's never been the same since. She has gone deaf, has trouble speaking, her facial muscles aren't working properly -- she looks just like her mother did before death. Conversation with her is heartbreaking, as he's constantly talking to people who aren't there, and saying how she's Kennedy's daughter or talking about aliens and such. She's lost it. And, when she and her kid's dad split, he got custody (of course). Her ex is abusive, but thankfully he's not keeping her daughter now. The child (now 10) lives with her paternal grandfather and he brings her to visit her mother (my cousin) every weekend. It must be so awful for her, just watching her mother deteriorate like that! And it was all preventable.
All because her doctor thought he was so morally superior and couldn't counsel her that she needed to terminate the pregnancy to safe her life. We don't know yet if the 10 year old has the same disease. She's a little young to see the effects. There's no test except to look for brain tumors. So we wait.