http://psytreasure.com/some-fascinating-facts-about-pineal-gland-the-organ-of-intuition-spiritual-awakening

The pineal gland (also called the pineal body, epiphysis cerebri, epiphysis or the “third eye”) is a small endocrine gland in the vertebrate brain. It produces the serotonin derivative melatonin, a hormone that affects the modulation of wake/sleep patterns and seasonal functions.

Studies show your pineal gland secretes a substance called Dimethyltriptamine (DMT), which you may be familiar with as a hallucinatory substance found in the South American shamanic brew called Ayahuasca.

The pineal gland is formed at 49 days within the human embryo: the same time that Tibetans believe it takes for a soul to reincarnate. And the same amount of days that the human embryo becomes either male or female.