primary Axis I diagnosis other than MDD (comorbid phobia, generalized or social anxiety disorder allowed)
high risk pregnancy (e.g., conditions requiring mandatory bed rest or complex medical regimens that will interfere with study participation or conditions where poor infant outcomes are anticipated)
starting antidepressants within 4 weeks of enrollment
current employment as shift worker
current alcohol or drug use disorders
women whose infants will not be living in the home or who will have a nighttime caregiver
Pittsburgh Sleep Quality Inventory (PSQI) \< 5 (i.e., those who report no sleep complaints during 3rd trimester of pregnancy and for whom an intervention targeting sleep might not be indicated).
women who do not speak and read English (because the complexity of translating the research instruments is beyond the scope of this project)
