A recent study published in Science Daily discussed the findings of a protein in semen that acts on the female brain to promote ovulation. The protein that they have called (OIF) Ovulation-Inducing Factor was compared to the numerous proteins in the mammals they were studying. The research scientists discovered that this OIF was the same protein as the Nerve-Inducing Factor protein (in nerve cells through out the body).The NIF protein/OIF protein in semen will send a signal to the female’s brain (hypothalamus) and the pituitary gland to produce/release hormones, which we know these hormones trigger the release of an egg.
The study was not on humans, therefore they are unsure what this implies for future studies on fertility in humans. To read more about the work being done: http://bit.ly/PAQRag