One physician notes that clinical observation shows that breastfeeding contractions do not produce dilation of the cervix. Accordingly, in the Moscona survey of 57 mothers breastfeeding during pregnancy, only four women (seven percent) recalled contractions related to breastfeeding at all.
The pituitary gland is situated under the brain and is an endocrine gland. The pituitary gland produces the adrenocorticotrophic hormones (ACTH), which are essential for all vital organs of the body. The pituitary gland is responsible for regulating the production of hormones in the adrenal and thyroid glands.
Testosterone is an androgenic hormone produced by the testis, ovary and in small amounts by the adrenal gland. In male dogs, testosterone is also responsible for changes within the basolateral nuclear group of the amygdaloid body associated with aggression. Levels vary with age and season changes, being highest in spring and autumn. Testosterone is converted to estrogen in both male and female dogs and regulation of body levels of these androgens is controlled by the pituitary-gonadal axis regulation via GnRH, LH and FSH.