Study	Reason for exclusion
Alvarado 1999	Insufficient outcome data for comparison group: assessed initiation of contraceptive method (from records) by the 30‐ to 40‐day postpartum visit. One‐year data on contraceptive use and pregnancy were available for only 10% of comparison group.
Brou 2009	No appropriate comparison group; outcomes by HIV status. Investigator communicated that all women had counseling on various modern methods; did not have material on counseling content.
Dhont 2009	Two study sites apparently provided the same counseling. Provision of contraceptives differed. One site provided implants and IUDs free of charge, while the other referred women to public clinic that charged small fee. Pills and condoms were free at public clinic.
Hale 2014	No apparent postpartum contact; intervention during pregnancy. Outcome was use of family planning services (from records) not contraceptive use.
Hoke 2014	Intervention not provided within 6‐week postpartum period. Participants could be up to 6 months postpartum.
Johnson 2003	No follow up; survey during postpartum hospital stay. Outcomes were satisfaction and reported influence of counseling on contraceptive method choice. No data on specific method choice or use.
Kan 2012	Pregnant or parenting teens who were not necessarily postpartum. Both groups received the same family planning counseling and referral. Special intervention group also had home visits and case management.
Koniak‐Griffin 1999	Random assignment to intervention group was noted in the text (not abstract).
Lee 2007	No relevant outcome; assessed knowledge, attitudes, and self‐efficacy.
Núñez Rocha 2005	Intervention was provided during third trimester (4 consecutive days). No apparent postpartum education or contact except for assessment of contraceptive continuation at 2 years during home visit. Contraceptive uptake was examined at 7 days postpartum with clinical records.
Patchen 2013	No comparison intervention or control. Same intervention was provided to all participants, though two locations were used.
Planned Parenthood 2013	Intervention apparently provided during prenatal clinic. Outcome assessment at 6 months postpartum. Trial completion estimated as July 2014.
Sangalang 2006	Pregnant or parenting teens who were not necessarily postpartum.
Sayegh 1976	Assessment time frame appeared insufficient (4 to 9 weeks postpartum). Outcome was 'acceptance' of contraception without type of contraceptive method. Data presented for 37% who returned to clinic by 9 weeks. Those who did not return within 5 weeks were interviewed at home; no data presented. Also, text referred to initiation, maintenance, and switching to safer method but data were insufficient for analysis.
Temmerman 1990	Inadequate information about intervention. Comparison group differed by HIV status as well as type of intervention.
Tocce 2012	Study groups were based on contraceptive method chosen (immediate subdermal implant (before hospital discharge) versus another contraceptive or no method). Both groups were in the same educational program.
Vikhlyaeva 2001	Insufficient outcome data for comparison group: no data on pregnancy or contraceptive use. Only had induced abortions by 2 years for 129 women who did not attend clinics.
Warren 2012	Inadequate comparison group. Two service integration models studied: 1) HIV services with family planning, for which postpartum status was not an eligibility criterion; 2) Postnatal care and HIV services with participants who were postnatal (0 to 10 weeks).