He quoted studies showing a high rate of depression among women with close pregnancies. (amotherinisrael.com)
In one study, rates of depression in mothers dropped from 70 % to 10 % after sleep training. (expectingscience.com)
For example, one study found that dog ownership was associated with lower rates of depression among women, but not men, and among single individuals but not married people. (simplypetsmagazine.com)