Objective: Little is known about women's preferences and willingness to pay (WTP) for drug information services in pregnancy. Teratology information services (TIS) provide drug information to pregnant women via telephone. To inform planning of an economic evaluation of TIS, a literature review of previous program evaluations of maternal health services using discrete choice experiment (DCE) methodology was conducted. Methods: A search of the literature in the databases PubMed, MedLine, and PsychLit, was performed. The search keywords used were “discrete choice experiment” and “pregnancy”. The studies were critically reviewed. Results: Five previous studies that have applied DCE methods in the context of pregnancy and maternal health were found. These studies have examined preferences for service attributes in relation to miscarriage management, in-vitro fertilization, prenatal screening for Down's syndrome, provision of emergency contraception, and provision of counseling services after rape. These studies found that preferred service attributes included good staff attitudes, continuity of care, sympathetic and non-judgmental treatment, privacy, and sensitive health care providers. Women were willing to pay to avoid pain and complications, and for good staff attitudes. Conclusion: Women's preferences and WTP for health care services that provide drug information during pregnancy remain unknown. A DCE approach to evaluating services avoids the methodological challenges associated with tracking and aggregating health outcomes in both the mother and her child over their lifetimes. DCEs are able to demonstrate the value of non-health attributes by assessing patient preferences for non-health outcomes, such as interactions with the health care provider. Consideration of non-health outcomes will be important to include in future evaluations of maternal health services.