Difference between revisions of "Ovaries Endocrine Function - Anatomy & Physiology"
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| − | Reproductive [[ | + | Reproductive [[Hormones - Anatomy & Physiology|hormones]] tend to have short half lives and act in minute quantities. They bind to specific receptors on their target organs. |
[[Female Reproductive Tract -Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]] | [[Female Reproductive Tract -Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]] | ||
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|<font color=Purple>Oestrogen</font> | |<font color=Purple>Oestrogen</font> | ||
| − | |GnRH from the [[ | + | |GnRH from the [[Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the developing ''follicles'' in the ovary to secrete this hormone. |
|Promotes development of mammary tissue and is vital for thickening of the endometrium prior to implantation. Oestrogens regulate the [[Female Reproductive Tract -Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]]. | |Promotes development of mammary tissue and is vital for thickening of the endometrium prior to implantation. Oestrogens regulate the [[Female Reproductive Tract -Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]]. | ||
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|<font color=Purple>Progesterone</font> | |<font color=Purple>Progesterone</font> | ||
| − | |This is produced in the Corpus Luteum after ovulation, and also the [[ | + | |This is produced in the Corpus Luteum after ovulation, and also the [[Placenta - Anatomy & Physiology|Placenta]] during pregnancy. |
|Progesterone is sometimes known as the ''hormone of pregnancy''. It converts the endometrium to its secretory stage to prepare for implantation, reduces the immune response within the uterus to allow for acceptance of the conceptus, and decreases contractility of the smooth muscle. | |Progesterone is sometimes known as the ''hormone of pregnancy''. It converts the endometrium to its secretory stage to prepare for implantation, reduces the immune response within the uterus to allow for acceptance of the conceptus, and decreases contractility of the smooth muscle. | ||
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|<font color=Purple>Inhibin<font> | |<font color=Purple>Inhibin<font> | ||
| − | |GnRH from the [[ | + | |GnRH from the [[Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Granulosa cells. |
|Inhibits FSH secretion. | |Inhibits FSH secretion. | ||
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|<font color=Purple>[[Endocrine_System_-_Pituitary_Gland_-_Anatomy_%26_Physiology#Oxytocin|Oxytocin]]<font> | |<font color=Purple>[[Endocrine_System_-_Pituitary_Gland_-_Anatomy_%26_Physiology#Oxytocin|Oxytocin]]<font> | ||
| − | |Oxytocin is mainly produced by the [[ | + | |Oxytocin is mainly produced by the [[Hypothalamus - Anatomy & Physiology|Hypothalamus]] and secreted by the [[Pituitary Gland - Anatomy & Physiology|Pituitary Gland]], however in some species including primates and ruminants it is produced by the Corpus Luteum. |
|In addition to allowing Milk let-down and promoting uterine contractions, oxytocin works along with oestrogen to induce endometrial production of PGF-2a resulting in regression of the Corpus Luteum. | |In addition to allowing Milk let-down and promoting uterine contractions, oxytocin works along with oestrogen to induce endometrial production of PGF-2a resulting in regression of the Corpus Luteum. | ||
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Revision as of 16:21, 3 September 2008
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Reproductive hormones tend to have short half lives and act in minute quantities. They bind to specific receptors on their target organs. Oestrus Cycle
| Hormone | Production and Regulation | Action |
|---|---|---|
| Oestrogen | GnRH from the Hypothalamus causes FSH secretion from the Pituitary Gland which stimulates the developing follicles in the ovary to secrete this hormone. | Promotes development of mammary tissue and is vital for thickening of the endometrium prior to implantation. Oestrogens regulate the Oestrus Cycle. |
| Progesterone | This is produced in the Corpus Luteum after ovulation, and also the Placenta during pregnancy. | Progesterone is sometimes known as the hormone of pregnancy. It converts the endometrium to its secretory stage to prepare for implantation, reduces the immune response within the uterus to allow for acceptance of the conceptus, and decreases contractility of the smooth muscle. |
| Inhibin | GnRH from the Hypothalamus causes FSH secretion from the Pituitary Gland which stimulates the Granulosa cells. | Inhibits FSH secretion. |
| Relaxin | This is produced by the Corpus Luteum towards the end of pregnancy as a result of fetal ACTH production. | Relaxes the cervix and pelvic ligaments in preparation for parturition. |
| Oxytocin | Oxytocin is mainly produced by the Hypothalamus and secreted by the Pituitary Gland, however in some species including primates and ruminants it is produced by the Corpus Luteum. | In addition to allowing Milk let-down and promoting uterine contractions, oxytocin works along with oestrogen to induce endometrial production of PGF-2a resulting in regression of the Corpus Luteum. |