Motivations for and experience with labor induction at 39 weeks in women with obesity-A qualitative study

Timing of induction of labor (IOL) at term has been investigated in multiple settings. In Denmark, the 'When to INDuce for OverWeight' (WINDOW) study compares IOL at 39 weeks of gestation vs expectant management in low-risk women with obesity. However, knowledge on women's expectations of and experience with IOL is sparse. The aim of this study was to explore women's motivation to join the WINDOW study and their experience when randomized to IOL at 39 gestational weeks.

A qualitative interview study of 25 pregnant women with obesity randomized in the WINDOW study to IOL at 39 weeks of gestation was conducted. Participants were recruited from four hospitals in Central Denmark Region and were interviewed four to six weeks after giving birth. A thematic analysis was performed using a phenomenological approach.

The analysis resulted in three main themes, (1) Motivation for IOL, (2) The IOL process, and (3) IOL in recollection and in the future. Participants perceived inclusion into the WINDOW study as a "great opportunity," as they hoped to be randomized to IOL at 39 weeks of gestation. Their main motivation for participating was physical discomfort in late pregnancy and a wish for "knowing" the timing of the birth. BMI-related risk factors were mentioned by few as a motivating factor. Some participants described the IOL process as a team effort between the couple and the midwives and were positive towards future IOL. Others associated the IOL process with prolonged labor or described the body as "reluctant" to respond to the induction regime. A desire to experience spontaneous onset of labor in a future pregnancy was mentioned.

Physical discomfort and wanting to "control" the onset of labor were main motivations for women's decision to participate in the WINDOW study, hoping they would be allocated for IOL. Comprehensive information and being supported by midwives through the IOL process was crucial for a positive IOL experience. Some participants were positive towards a future IOL. Others speculated if their body was not ready for birth in 39 weeks of gestation and/or associated the IOL process with a challenging labor.