It is important for a project manager to understand timing and scheduling and how to make planning tools work for their project and not the other way round. Time is unique and unlike other resources such as money and people lost time can never be replaced. The impact of a family planning program can be seen in the form of increased use of contraceptives, increased motivation to control births and increased preferences to have a smaller family. The main objective of this study was to determine the factors affecting implementation of Family Planning projects in Kenya. Specifically, the study sort to, assess the effect of technical capability on implementation of family planning projects in Kenya, examine the effect of project planning on implementation of family planning projects in Nairobi, Kenya, assess the effect of financial controls on implementation of family planning projects in Nairobi, Kenya, establish the effect of project communication on implementation of family planning projects in Nairobi, Kenya and determine the moderating effect of culture on the factors affecting implementation of family planning projects by non-governmental organizations in Nairobi, Kenya. The study was governed by three theories; project management theory, Lewin’s Change Management Theory, Logical Framework model and Network Theory. The research adopted descriptive research design. The target population was 750 registered Health NGOs in the health sector in Nairobi. The study used simple random sampling to select 225 registered NGOs that are involved in Family Planning in Nairobi. The study used both primary and secondary data. Primary data was collected by use of questionnaires which was self-administered with the help of research assistant. Secondary data was collected from literature review. Quantitative data analysis included both descriptive and inferential statistics. Descriptive statistics included frequencies, percentages, means and standard deviation while inferential statistics included a multiple linear regression mode. Results were presented in form of tables and charts. Qualitative data was analyzed through content analysis and presented in continuous prose form. Based on the findings the study concluded that technical capability has an effect on the implementation of family planning projects in Kenya. The study also concluded that project planning also influence the implementation of family planning projects in Kenya. Further, it was possible to conclude that project communication and financial controls affect implementation of family planning projects in Kenya.