1. Gonadotrophin Releasing Hormone (GnRH): Secreted from the hypothalamus of the brain. Controls FSH, LH, testosterone hormones and egg production.
2. Luteinizing Hormone (LH): Produced by the anterior pituitary gland. The ovaries produce corpora luteum and secrete the hormone progesterone.
3. Follicle Stimulating Hormone (FSH): Produced by the anterior pituitary gland. Follicle growth, ovulation and estrogen production.
4. Luteotrophic hormone (LTH) is produced by the pituitary gland. It is also called prolactin hormone. It causes mammary gland development and milk secretion.
5. Oestrogen: Produced by ovarian follicles and corpus luteum.
6. Progesterone: Produced by ovaries and fallopian tubes. It stops the secretion of GnRH, FSH and LH hormones. Makes the uterine wall suitable for embryo retention and develops mammary glands.
7. Relaxin: Secreted by ovaries and fallopian tubes. It causes muscle contractions during childbirth. Prevents natural abortion by preventing uterine wall contractions. Increases the amount of water inside the uterus. Mammary glands also develop and secrete milk.
8. Gonadocorticoid Hormone: Produced by the adrenal glands. Regulates embryonic sex differentiation. Develops sexual organs, gonads and secondary sexual characteristics.