The jury sided with one opinion over the other- that of the prosecutions expert. This is not the same as fact or proven by any measure
If two experts disagree, then that’s what the jury have to do, isn’t it? But they don’t “side”, which implies bias, they have to look at the evidence, listen to the experts’ opinions and go with the one they believe to be most correct. The defence talked of “possibly” and “could have”.
Somebody can do something wrong knowingly and without psychosis, and then regret it. If it was something very bad, they might indeed block out the details of what they did, but that doesn’t mean they were suffering with psychosis when they committed the bad act, just that they can’t face up to what they did.
Mayo has had a long time to deal with/think about/face what happened. She hasn’t done that. The judge was at pains to say he would state facts prior to his sentencing statement. He mentions the doctor who was claimed to be biased against Mayo, but continues,
”However, I accept the prosecution's submissions that, on any view, you knew you were pregnant and about to give birth an hour or so before you did so. At that time there is no question of the balance of your mind being disturbed by pregnancy denial or any other condition”