1. REGULATION OF REPRODUCTION
CHAPTER 5

3. Brain – Hypothalamus - Pituitary Gland
PINEAL
Melatonin
HYPOTHALAMUS
GnRH (Gonadotropin Releasing Hormone)
ANTERIOR PITUITARY
LH (Luteinizing Hormone)
FSH (Follicle Stimulating Hormone)
PROLACTIN
TSH (Thyroid Stimulating Hormone)
ACTH (Adrenal Cortical Tropic Hormone)
STH or GH (SOMATOTROPIN)
POSTERIOR PITUITARY
OXYTOCIN
ADH (Antidiuretic Hormone)

5. Suckling stimulus Afferent neurons Afferent neurons Muscles in
Tactile stimulus of
the penis
Afferent neurons
Afferent neurons
Muscles in
excurrent
ducts
Oxytocin production
release from the
posterior lobe
Ejaculation
Myoepithelial cell
around alveoli
Milk letdown

8. Suckling stimulus Afferent neurons Afferent neurons Muscles in
Tactile stimulus of
the penis
Afferent neurons
Afferent neurons
Muscles in
excurrent
ducts
Oxytocin production
release from the
posterior lobe
Ejaculation
Myoepithelial cell
around alveoli
Milk letdown

10. P

14. Hormones classified by source
Hypothalamus
Uterus
Gonadotropin Releasing Hormone
Oxytocin
Prostaglandin F2a
Pituitary
Placenta
Luteinizing hormone
Follicle stimulating hormone
Prolactin
Oxytocin
TSH, ACTH, STH, ADH
Progesterone
Estrogen
Placental Lactogen
Gonads
Equine Chorionic Gonadotropin
Estrogen
Progesterone
Testosterone
Inhibin
Oxytocin
Relaxin
Human Chorionic Gonadotropin

15. Hormones classified by mode of action
Neurohormones
Oxytocin
Releasing Hormones
Gonadotropin Releasing Hormone
Gonadotropins
Luteinizing Hormone
Follicle Stimulating Hormone
Human chorionic gonadotropin
Equine chorionic gonadotropin
Sexual Promoters
Estrogen
Progesterone
Testosterone
Luteolytic - Prostaglandin F2a
Pregnancy Maintenance / Lactogenic
General Metabolic – ACTH, STH, TSH

16. Hormones classified by biochemical structure
Peptides - small proteins – few amino acids
Gonadotropin releasing hormone
Glycoproteins – polypeptides with carbohydrate moieties
Luteinizing hormone
Follicle stimulating hormone
Thyroid stimulating hormone
Inhibin
Activin
Prolactin
Steroids – synthesized from cholesterol
Progesterone
Testosterone
Estradiol
Prostaglandins – unsaturated hydroxy fatty acids from arachidonic acid
Prostaglandin F2a
Prostaglandin E2
Pheromones