Table 1 Initial search strategy using the SPIDER search strategy tool

S—Sample

S1: Tx Adolescen* OR teen* OR young*

S2: Tx “Low-and middle-income countries” OR “Developing Countries” OR LMIC

PI—Phenomenon of Interest

S3: Tx Pregnan* OR antenatal OR prenatal

D—Design

S4: Tx “Focus Groups” OR interview* OR “case stud”*

E—Evaluation

S5: Tx Experience* OR attitude* OR feel* OR thought* OR view* OR perspe* OR encounter* OR opinion* OR belief* OR perce* OR understand* OR expect*

R—Research Type

S6: Tx Qualitative OR “mixed methods”

Combining search terms:

S7: S1 AND S2 AND S3 AND S5

S8: S4 AND S6

S9: S7 AND S8