@Bix Better doctors should decide than judges, politicians, and police. But really the woman should decide.
A doctor can explain, e.g., that there's a 10% chance of maternal death, 15% fetal death, 15% severe fetal disability, 20% chance of sterility. She might even be able to explain what a 2 year life expectancy with those disabilities might mean for child and family. Only the woman can decide whether she's willing to take those chances.
All else should support her.