00:01
I ask you to introduce two key hormones involved in reproduction and their stage of appearance and their functions.
00:09
So i choose hcg hormone.
00:14
So this is human charyonic gondotropic.
00:18
So the stage the hormone shows up usually is as early as 10 to 6 days post -fertilis.
00:35
So basically when the sperm fertilized the egg, six to ten days later, the corion layer will actually start a secret hcg.
00:54
And this is secreted by the corion, and hence the name it comes from.
01:04
So the corion is the part of the developing placenta.
01:10
Part of the developing placenta.
01:23
So this is what we call human charyonic vanadotropid.
01:29
The function of this hormone is to, first of all, it's maintained by the corpus luteum, which secrete the progesterone, ensure the continued production of progesterone and estrogen.
01:44
So it means the hcg, hormone maintains the very important structure, corpus luteum.
01:58
Corpus luteum basically is the remaining part of a follicle once the egg is actually being released.
02:04
So it looks yellowish color and a secret progesterone.
02:09
And the corpus luteum will actually degrade if the fertilization doesn't occur.
02:15
It will degrade and break and then the stock secreting progesterone.
02:20
And then the next cycle starts.
02:24
But when the fertilization actually occurred, and hcg is produced by cori -on, then it's going to maintain the corpus luteum pass that 28 -day cycle...