The UN Secretary-General constituted a high-level panel on system-wide coherence in 2005 within the areas of development, humanitarian assistance and the environment. The panel adopted “Delivering as One” as a slogan for its coherence initiative. Pakistan was among eight pilot countries implementing this reform initiative. Five joint programmes were developed, on health and population; agriculture, rural development and poverty reduction; disaster risk management; education; and environment . Fourteen UN agencies supported the health and population joint programme and participated in its implementation. Although confronted by many challenges, the positive results of the joint programmes confirmed the advantage of Delivering as One over the past scenarios of fragmentation, duplication and incoherent government and UN strategic operations. The paper shares the accomplishments of the health and population sector including its ability to harness the power of intersectoral collaboration and prospectively concentrate human and financial resources around the strategic national priorities.