Placental Hormones: HCG, HPL & Relaxin

[Suraj M]

Which are the hormones that the placenta secretes?
I have contradicting facts from the web, from my books and from my teachers
I know for certain HCG, HPL and relaxin are secreted, other than that?

 

[jedishrfu]

I found this website:

http://study.com/academy/lesson/hormones-of-the-placenta-estrogen-progesterone-hcg.html

If I were you I'd have to go with what my teacher and course book say over anything found on the internet unless its from a very reliable source. There shouldn't be any contradictory facts here.

 

[Suraj M]

I found this website:

http://study.com/academy/lesson/hormones-of-the-placenta-estrogen-progesterone-hcg.html

If I were you I'd have to go with what my teacher and course book say over anything found on the internet unless its from a very reliable source. There shouldn't be any contradictory facts here.

Hey, that link says that HCG is secreted by the fertilised egg and not the placenta! Huh?

 

[jedishrfu]

The wikipedia article says the same thing. Its a good question to ask your teacher. It seems the hormones are used to communicate so the egg gives off the HCg and the placenta recognizes it and starts to give off other hormones.

https://en.wikipedia.org/wiki/Human_chorionic_gonadotropin

 

[Suraj M]

What our teacher explained was that HCG is similar to LH in structure and similar to Progesterone in function, it actually stimulates the corpus Luteum to secrete progesterone
We were told that progesterone is not secreted directly from the placenta
I think that's wrong

 

[Silicon Waffle]

Which are the hormones that the placenta secretes?
I have contradicting facts from the web, from my books and from my teachers
I know for certain HCG, HPL and relaxin are secreted, other than that?

Also including progestins and estrogen as sex steroids
http://www.vivo.colostate.edu/hbooks/pathphys/reprod/placenta/endocrine.html

 

[Suraj M]

Maybe that's true only in the early parts of pregnancy
What do they mean by later stages of pregnancy ?

 

[jedishrfu]

Pregnancies last 9 months and are divided into three trimesters each of varying time periods (see the timeline in the wikipedia article):

https://en.wikipedia.org/wiki/Pregnancy#Physiology

 

[Suraj M]

Pregnancies last 9 months and are divided into three trimesters each of varying time periods (see the timeline in the wikipedia article):

https://en.wikipedia.org/wiki/Pregnancy#Physiology

That wasn't my question
I meant "later part of the pregnancy" because later is relative, so in this context when exactly is that?