Or as the article says:
The scientists showed that oxytocin, one of the two major hormones secreted in the adult neurohypophysis, is involved in the development of this brain area already in the embryo. At this stage, the oxytocin governs the formation of new blood vessels. "The messenger helps to build the road for transmitting its own future messages," says Levkowitz .
http://www.sciencedaily.com/releases/2011/11/111102093035.htm
The scientists showed that oxytocin, one of the two major hormones secreted in the adult neurohypophysis, is involved in the development of this brain area already in the embryo. At this stage, the oxytocin governs the formation of new blood vessels. "The messenger helps to build the road for transmitting its own future messages," says Levkowitz .
http://www.sciencedaily.com/releases/2011/11/111102093035.htm