Biology — Hormonal Control of the Menstrual Cycle

digraph MenstrualCycle {
  rankdir=LR;
  node [shape=box, style=rounded];
  "Hypothalamus" -> "Pituitary" [label="GnRH"];
  "Pituitary" -> "Ovary" [label="FSH and LH"];
  "Ovary" -> "Follicle / egg" [label="FSH: maturation"];
  "Ovary" -> "Oestrogen" [label="from follicle"];
  "Oestrogen" -> "Uterus lining" [label="thickens"];
  "Ovary" -> "Progesterone" [label="corpus luteum"];
  "Progesterone" -> "Uterus lining" [label="maintains"];
}