Animals 4 Male 4 Pituitary Hormones, Anterior 4 Prolactin 4 adenohypophysis hormone 4 prolactin 4 ACTH 2 Adrenocorticotropic Hormone 2 Eels 2 FSH 2 Female 2 Follicle Stimulating Hormone 2 Gonadotropins, Pituitary 2 Growth Hormone 2 Growth hormone 2 Humans 2 Immunocytochemistry 2 Immunohistochemistry 2 LH 2 Light microscopy 2 Luteinizing Hormone 2 Melatonin 2 Organ Culture Techniques 2 Pineal Gland 2 Pineal organ culture 2 Pituitary Gland, Anterior 2 Pituitary cells 2 Pituitary gland 2 Rats 2 Synbranchiformes 2