Yes, not been very clear. Ive mentioned it because such a background increases the chances of psychosis.
It’s a factor because a bad home life increases the odds a girl will experience psychosis. Girls & women with backgrounds of childhood abuse fall into what is called a Clinical High Risk (CHR) category for psychosis in pregnancy or post partum.
“Adverse life events have repeatedly been implicated in the development of First Episode Psychosis (FEP)7 with 89% of FEP patients reporting one or more adversities compared to 37% of controls8. Specifically, childhood/adolescent sexual, physical, and emotional abuse, physical/emotional neglect, separation, and institutionalization were 4–17 times higher for the FEP group. Moreover, for each additional adversity, the risk of psychosis increased 2.5 times8. Similarly, CHR individuals were found to have experienced significantly more severe adverse events than controls, regardless of trauma subtype9. Specifically, CHR individuals were 5.5, 2.5, and 3.1 times as likely to report emotional abuse, physical abuse, and bullying victimization, respectively9.”
So for individuals who are not CHR, the stress of an unplanned pregnancy is far less likely to cause psychosis
“Therefore, an individual with a high bio-psychosocial vulnerability will only need to experience a low level of (internal or external) stress in order to develop psychosis; while in contrast, an individual with a low overall level of bio-psychosocial vulnerability will need to experience a high level of stress in order to manifest the illness.”
Please note this study isn’t limited to stress of pregnancy or psychosis in pregnant/post partum women. It is talking across the board, so the stress they mention can be any life event that causes stress.
https://www.nature.com/articles/s41537-023-00362-z