Many studies report empirical relationship either between fertility and labour supply or, between health and
labour market outcomes. In this paper, an extension of these ideas involves explicitly considering how
fertility and health affect each other, and how they interrelate with labour force participation. A unifying
framework is provided and a simultaneous three equations model developed to capture the interdependence
between these variables as well as their respective determinants. The model is estimated using a cross-section
data set obtained from a survey of the urban Cameroon population. The results indicate that: (i) fertility
and health status are significantly interrelated, thus separate estimations of fertility (or health status) and
participation will produce misleading results; (ii) working in either sector of the labour market significantly
reduces fertility but, unlike many previous studies, fertility has a positive impact on the probability of labour
force participation; (iii) there is strong evidence that health and disability status is a significant determinant
of employment, but the reverse depend on the labour market sector and on the health indicator used.