Final answer:
Research studies consistently find similar rates of perinatal depression in women globally, with influences such as socioeconomic status and healthcare access being significant factors. Countries like the United States and Australia show comparable instances, highlighting the universal nature of this issue across diverse populations.
Step-by-step explanation:
Research studies indicate that the rates of perinatal depression in women are consistent worldwide, with similar instances found in countries such as the United States and Australia. This consistency can be attributed to several factors, including economic status, access to care, and educational opportunities related to prenatal and postnatal care. Factors like poverty and wealth significantly influence these rates, underscoring the importance of accessible healthcare services for expecting and new mothers. Additionally, the "global feminization of poverty" highlights that women disproportionately experience poverty, affecting their mental health during the perinatal period. It's noteworthy that while depression is prevalent across different demographics, women have consistently shown higher rates of depression, as confirmed by various studies including that of Whang et al. (2009), which focused on coronary health and depression in women.