Difference between revisions of "Sex Hormones"

Revision as of 14:15, 21 February 2011

Sex hormones are produced by the zona reticularis of the adrenal glands in addition to those produced by the ovary and testis:

Testis: Produces androgens:
- Increase mitoses in skin.
- Increase sebaceous secrretion.
- Increase hair growth.
Ovary: Produces oestrogens and progesterone. Effects of oestrogens include:
- Decreased collagen production.
- Decreased sebaceous secretion.
- Decreased epidermal thickness.
- Decreased hair growth.
- Increased skin pigmentation.

@@ Line 21: / Line 21: @@
 **Increased skin pigmentation.
 ==[[Hyperoestrogenism]]==
-===Females===
-'''''Ovarian Imbalance Type 1'''''
-Seen in adult bitches who present with alopecia and increased pigmentation round the perianal, perigenital and axillary areas.
-Caused by:
-*Cystic ovaries.
-*Ovarian neoplasia.
-===Males===
-Dogs present with bilaterally symmetric alopecia, similar hyperpigmentation to that seen with female dogs with ovarian imbalance, loss of libido and gynaecomastia.   The dogs become attractive to other male dogs.
-Caused by:
-*[[Sertoli Cell Tumour - Pathology|Sertoli cell tumour]].
-*[[Male Feminising Syndrome - Pathology|Male feminising syndrome]].
-[[Category:Endocrine System - Pathology]]
 ==[[Hyperandrogenism]]==