Final answer:
The most likely time for a woman to develop new onset psychosis is during the postpartum period.
Step-by-step explanation:
The most likely time for a woman to develop new onset psychosis is during the postpartum period. According to a study by Wisner et al. (2013), women who screened positive for depression after childbirth were more likely to experience thoughts of self-harm and receive a diagnosis of psychosis. Another study by Khashan et al. (2008) found that antenatal maternal exposure to severe adverse life events increased the risk of offspring developing schizophrenia. While the exact causes of psychosis are complex and may involve genetic and environmental factors, hormonal changes during pregnancy and the postpartum period play a role in the development of psychosis in some women.