The endocrine gland below the brain is the pituitary gland. It
is split into anterior (adenohypophysis) and posterior
(neurohypophysis) sections. They differ in the hormones they
produce.
Adenohypophysis: ACTH (adrenocorticotropic hormone), TSH
(thyroid stimulating hormone), FSH (follicle stimulating hormone),
LH (luteinizing hormone), GH (growth hormone), Prolactin
Neurohypophysis: Oxytocin, ADH (antidiuretic hormone, aka
vasopressin)