Totally agree, jingl, and though I concede that the full facts aren't yet known, it's a fact that two people are now dead who needn't have been. Assuming that her mental health state was known to the staff, which it most definitely would have been, I find it hard to understand how she a) was going to be discharged so early and b) was allowed to walk out unnoticed from the hospital with her baby.
As I said before, I have had personal experience of lack of care of my mentally vulnerable daughter in another hospital, but I hoped that experience wasn't common, shocking though it was. And no, maternity wards are not psychiatric wards but mental illness is widespread enough. It doesn't disappear when you go into labour and any ongoing care needs to be continued. To fail a patient at this stage could be dangerous. I have no idea whether or not this happened, but hopefully the review will uncover the truth and ensure that this tragedy is less likely to happen in the future.