Figure 3From: A phase plane graph based model of the ovulatory cycle lacking the "positive feedback" phenomenonLH and progesterone values from Figure1, reported by Stricker et al. [[5]], shown as a phase plane graph. Data points are labeled with days of the cycle. They form a pattern that resembles a "boomerang" shape. Other cited data sets of hormonal values produced very similar phase plane graphs of these two hormones during the cycle This pattern is described in the The follicular phase to Lutheolysis.Back to article page