Stimulatory and inhibitory hypothalamic releasing hormones

Anterior pituitary hormone	Hypothalamic releasing hormone	Stimulatory or inhibitory	Stimuli for activation of the system
Adrenocorticotrophic hormone (ACTH)	Corticotrophin releasing hormone (CRH)	Stimulatory	Stress (e.g. pain, fever, hypoglycaemia, low BP)
	Vasopressin	Stimulatory
Thyroid stimulating hormone (TSH)	Thyrotrophin releasing hormone (TRH)	Stimulatory	Rhythmic activity in the hypothalamus
Follicle stimulating hormone (FSH) and Luteinising hormone (LH)	Gonadotrophin releasing hormone (GnRH)	Stimulatory	Rhythmic activity in the hypothalamus
Growth hormone (GH)	Growth hormone releasing hormone (GHRH)	Stimulatory	Exercise, stress, hypoglycaemia, arginine administration, high amino acid levels
	Somatostatin	Inhibitory
Prolactin (PRL)	Dopamine	Inhibitory	Sleep, stress, suckling stimulus
	Thyrotrophin releasing hormone (TRH)	Stimulatory