Additional country (Nigeria) has been added to original country, Pakistan. Therefore, an updated protocol has been submitted (NCT06081842)

High-quality contraceptive counseling can strengthen global efforts to reduce the unmet need for and suboptimal use of modern contraceptives. This study aims to identify a package of contraceptive counseling interventions designed to strengthen existing contraceptive services and determine its effectiveness in increasing clients' level of decision-making autonomy and meeting their contraceptive needs.

Methods The five-phase complex intervention design starts with a pre-formative phase aimed at mapping potential study sites to establish the sampling frame. The two-part formative phase first uses participatory approaches to identify the perspectives of clients, including young people and providers, to ensure research contextualization and address each interest group's needs and priorities; clinical observations of client-provider encounters to document routine care form the second part. The design workshop of the third phase will result in the development of a package of contraceptive counseling interventions. In the fourth and experimental phase, a multi-intervention, three-arm, single-blinded, parallel cluster randomized-controlled trial will compare routine care (arm 1) with the contraceptive counseling package (arm 2) and the same package combined with wider method availability (arm 3). The fifth and reflective phase aims to analyze the package's cost-effectiveness and identify implementation barriers and enablers. The primary outcomes are clients' level of decision-making autonomy and met need for modern contraceptives.

Discussion Applying participatory action research principles in designing, testing, and scaling up effective, affordable, and sustainable counseling interventions could help optimize clients' decision-making autonomy and meet their needs for modern contraceptives in low-resource settings. Recognizing the socio-cultural and health service complexities surrounding contraception, including client-provider power dynamics, the study assumes that engaging key stakeholders, including adolescents, women, men, service providers, and policymakers would be more effective. A set of low-technology interventions will likely affect, at the individual level and in a sustainable way, the knowledge, attitudes, and behaviors of women and couples toward contraceptive counseling and provision. At the health service delivery level, the trial implementation would necessitate a shift in providers' attitudes and accountability toward a systematic integration into their clinical practice of must-have and person-centered counseling components, as well as improved health service organization to ensure the availability of competent staff and diversity of contraceptive choices.

1. she comes to the family planning clinic with the intention to 1.a. use contraception for the first time in her life (new user), or 1.b. switch from a contraceptive method to another one (switching user), or 1.c. resume a method after not using any in the prior three months (lapse user), or 1.d. discontinue a modern method (discontinuing user);
2. she is not coming for the resupply of a currently used method, such as pills or injectables;
3. she has the intention to continue her follow-up at the health center during the 12-month study follow-up;
4. she does not participate in another study; and
5. she provides informed consent.

(i) use of a controlled access approach, such as upon reasonable request from the World Health Organization; (ii) the trial will seek consent for sharing IPD from trial participants with adequate assurance that patient privacy and confidentiality will be maintained

Supporting information will become available 6 months after data collection and will be available for at least 3 years

Upon reasonable request from the World Health Organization