All schools of thought believe that infancy is crucial to the formation and development of the human character. Nevertheless, a search of literature revealed the lack of a clear definition of the concept of 'infancy care based on an Islamic perspective' in nursing texts. As the lack of a clear definition of a concept conveys the inapplicability of that concept to its relevant field and community, this study was conducted to explore and determine the characteristic features of the concept of infancy care based on the perspective of Islam. Walker and Avant's (Strategies for theory construction in nursing. Prentice Hall, Boston, 2011) literary concept synthesis as the manner of concept development approach was conducted. Islamic documents were surveyed without any time limitation. Findings involved the extraction of six main concepts, including God as the Merciful Nurturer, mother as the symbol of the Creativity and Divinity of God, infant as a person with dignity and potential for excellence, parents as the nurture way paver, basic principles of nurturing, and holistic lifelong health promotion. The theoretical definition of each concept was presented. From the perspective of Islam, infant care is the nurturing of a human who has been conceived with dignity, certain rights, identity, and the capacity for development and excellence.

In this systematic literature review, all the Shiite-Islamic documents (Quran and Hadith) without any time limitation were surveyed, analyzed and synthesized for the purpose of determining the foundations of lifelong health. The data were analyzed and combined using inductive qualitative content analysis method. Two main categories were emerged from the analysis: "prevention of health problems" and "health maintenance and promotion." In conclusion based on Islamic perspective, the foundations of comprehensive health of a person, i.e., health in all physical, mental, social, and spiritual dimensions, are begun to form at four stages: the time of marriage of his parents, the moment of their conception, when he is unborn in his mother womb, and during infancy period. Observing religion instructions in this regard is not the sufficient condition for being completely healthy; however, such instructions can provide a base for being a healthy person.