Complex networks that connect hundreds or thousands of nodes together can function properly through the use of nodes interacting, affecting and regulating one another. Genetic networks underlying high-level hormonal changes are also believed to be complex and most of the time are not yet very well understood. There are also different networks with common genes that start to activate or deactivate at the same time, which also adds to the difficulty of the problem of understanding genetic networks. Therefore, finding genes transcriptionally active in a gene set that are responsible for a change in the human body is a key point in reaching the underlying network structure. Here, we present a new technique that searches for these nodes in a set of variables that connect to form a network. It is a stepwise greedy search that investigates the change in a chosen network when one node is taken out at a time.