All these hormones! Is this correct?

[eme1ieh]

After you ovulated the corpus luteum start to produce progesterone.

If you're pregnant the yolk sac start to produce hcg which tell the corpus luteum to keep produce progesterone. (Keep the bleeding away) Is this correct so far?

When there is a fetus, the yolk sac's function is to transport nutrition to the embryo and also works as a circulatory system. Correct? -But what is the fetus actually nutrition? Before the placenta takes over. Does the fetus eat progesterone from the corpus luteum? Sounds Wrong..

If the fetus is measuring small/no growth, can one reason to this be low progesterone levels?
Or is the progesterones only mission to keep the bleeding away? In other words not having anything to do with the nutrition?

Maybe this type of question isn't funny to answer, but i'm honestly very curious. :)

[True Blue]

Once implantation occurs the embryo receives nutrients from the cells lining the uterus.
As implantation is happening a yolk sac is formed and this becomes the nutrtion from mum to embryo until the placenta is formed and takes over :)

Progesterone prepares the uterus for pregnancy. It also keeps the uterus in good condition, thick lining etc which in turn ensures good nutrition to the embryo so yes progesterone would be play a big role in nutrition until placenta starts doing it's job :)

This is my understanding lol

[eme1ieh]

Thank you True blue!

Do you mean that the thick lining is giving the embryo nutrition? Correct me if i'm wrong. :)
The progesterone from the corpus luteum doesn't directly give the embryo nutrition? (Does progesterone and other hormones really contains nutrition?)
Does that mean that no growth can be related to a thin lining?

[True Blue]

I don't actually know :) I could be wrong above its just what I believe happens.

I just looked it up for you and actually it is the estrogen hormone that is responsible for the endometrium lining. It says the endometrium is thickened, rich in blood vessels and glands.
The thickness plays a vital role in implantion and supports the growing baby.
Without this lining implantation cannot happen so I don't think it is something to affect growth of the embryo (someone who knows all of this will correct me) I think if the lining is not right implantation just won't happen.

I'm only learning here you got me curious enough to look it up but it's all new to me this much detail.

[atomic sagebrush]

I think you need to step away from your computer LOL

The fetus does not "eat progesterone", the progesterone (which is at first made by the corpus luteum until the placenta takes over) just keeps your uterus lining nice and thick and helps make the changes in your body to sustain a pregnancy. Before the placenta develops, the embryo first absorbs glucose from the fluids in the tubes and uterus, and then from the yolk sac and lining.

The embryo sends a signal to your body, and if this signal is not "right" (because there is something wrong with it) then your body gradually stops making progesterone and will end the pregnancy.

[atomic sagebrush]

If you google "yolk sac" there are several really good descriptions. :) It's a combo of what the baby makes themselves and the lining of the uterus

[atomic sagebrush]

Progesterone DOES NOT give a baby nutrition.

IF a lining is poor, the signal does not reach your body to sustain the pregnancy. This also happens if the baby does not send the right signal.

IT is a very rare situation that a bad lining is preventing pregnancy. I think you are obsessing over this too much.

[The Anchor]

If you google "yolk sac" there are several really good descriptions. :) It's a combo of what the baby makes themselves and the lining of the uterus

Don't encourage her! LOL. Eme, are you concerned that you have low progesterone?

[eme1ieh]

I was asking cause i'm curious, not so worried. I didn't actually thought progesterone was the embryos nutrition, that sounded wrong, exactly as i wrote. I just wanted a clear answer about the primary function of progesterone and the embryos nutrition.

I'm sorry that you think i'm obsessing, it makes me kinda sad. :( I'm honestly just like to read and learn about fertility. Sometimes i'm worried, sometimes i'm not. Not always!
In Sweden the information is very limited. I'm always googling before i ask you wonderful moms. I know i sometimes have a lots of questions.

[eme1ieh]

Don't encourage her! LOL. Eme, are you concerned that you have low progesterone?

Before i knew enough about progesterone i was a little bit worried about this. But i don't have any noticeably symptoms that can be realated to low progesterone levels, besides three miscarriage.

[atomic sagebrush]

It's totally fine and I"m happy to answer, my concern came from the fact that you had posted several times seeming (to me, which I am probably wrong) like you were obsessing over whether you had enough progesterone or not, and then this question came along. I just wanted to be sure you were not taking it too seriously. :)