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| − | | + | <big><center>[[Endocrine System - Anatomy & Physiology|'''BACK TO ENDOCRINE SYSTEM ANATOMY & PHYSIOLOGY''']]</center></big> |
| − | The Placenta is a hugely important endocrine organ, producing many [[Hormones - Anatomy & Physiology|hormones]] which affect the status of pregnancy and the maternal physiology.
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| − | {| border="1" cellpadding="5" cellspacing="0"
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| − | |+ ''Hormones of the Placenta''
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| − | !Hormone
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| − | !Production and Regulation
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| − | !Action
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| − | |Prostaglandin F2a
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| − | |Produced towards the end of pregnancy in increasing amounts to allow for parturition.
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| − | |Causes luteolysis and promotes uterine contractions.
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| − | |-
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| − | |Progesterone
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| − | |The Placenta takes over Progesterone production from the Corpus Luteum to maintain the pregnancy.
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| − | |Maintains the pregnancy by thickening the cervix, depressing the maternal immune response and preventing ovulation. It also promotes mammary growth.
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| − | |-
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| − | |Oestrogen
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| − | |Oestrogen levels rise throughout pregnancy as the placenta grows.
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| − | |Stimulate the growth of the myometrium, promote mammary development and suppress gonadotrophin release from the [[Pituitary Gland - Anatomy & Physiology|pituitary gland]].
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| − | |-
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| − | |Placental Lactogen
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| − | |This is related to [[Lactation - Endocrine Control - Anatomy & Physiology|Prolactin]] and [[Pituitary Growth Hormone - Anatomy & Physiology|Growth hormone]], and is produced by the placenta and uterus.
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| − | |Promotes growth and differentiation of mammary tissue. Identified in primates, ruminants and rodents.
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| − | |-
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| − | |Equine Chorionic Gonadotropin (eCG)
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| − | |This is produced by foetal trophoblast cells, and is actually the same molecule as equine LH.
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| − | |Prevents luteal regression and is thus the signal for [[Maternal Recognition of Pregnancy - Anatomy & Physiology|Maternal Recognition of Pregnancy]] in equids.
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| − | |-
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| − | |Human Chorionic Gonadotropin (hCG)
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| − | |This is produced by foetal trophoblast cells.
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| − | |Prevents luteal regression and is thus the signal for [[Maternal Recognition of Pregnancy - Anatomy & Physiology|Maternal Recognition of Pregnancy]] in primates.
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| − | |}
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| − | ==Webinars==
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| − | <rss max="10" highlight="none">https://www.thewebinarvet.com/urogenital-and-reproduction/webinars/feed</rss> | |
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| − | [[Category:Endocrine System - Anatomy & Physiology]][[Category:Pregnancy and Parturition]]
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