Perinatal Mental Health Study (PMHS) India

Inclusion Criteria: For Phase 1 (qualitative study) and Phase 2 (validation study): Pregnant women: * Aged 18 to 45 years * Currently pregnant (any trimester) * Willing and able to give informed consent Post-partum women: * Aged 18 to 45 years * Currently post-partum (between 1-12 months postpartum) * Willing and able to give informed consent Non-perinatal women: * Aged 18 to 45 years * Not currently pregnant and not given birth in the past 12 months * Willing and able to give informed consent For Phase 3 (prospective cohort study): Perinatal women: * Aged 18 to 45 years * In early pregnancy (estimated gestational age \<20 weeks) at recruitment * Not planning to relocate for the duration of the study period * Willing and able to give informed consent * Expressed a willingness to continue to participate for the four planned visits Non-perinatal women: * Aged 18 to 45 years * Not currently pregnant and not given birth in the last 12 months * Not planning to relocate for the duration of the study period * Willing and able to give informed consent * Expressed a willingness to continue to participate for the four planned visits Exclusion Criteria: The participant may not enter the study if: * They have an acutely severe psychiatric illness which impairs their ability to take part in the study * They are not willing or able to provide informed consent Other than for current severe psychiatric illness which affects ability to participate in the study, we will not exc…