If the sperm cell fertilises the ovum, and implantation does not occur, then the corpus luteum degenerates and it turns into corpus albicans, stopping progesterone secretion. If fertilisation occurs and implantation also, the syncytiotrophoblast, the "root part" of the blastocyst (one of the early structures originated from the zygote), produces a hormone that is called <span>human chorionic gonadotropin (hCG). The hCG is what makes the corpus luteum keep secreting progesterone and maintain itself. The progesterone will then help keep the endometrium and, therefore, allow the development of the embryo to happen.</span>
9 is letter d and 10 is a
75% it will be RR or Rr and will have red eyes 25% it will have rr with different colored eyes.
The living animal, Mrs Nerg, And the seven life proccesses! There are seven Life Proccesses that tell us that animals are alive. Although her name sounds a bit strange, The letters in it stand for life proccesses - movement, Reproduction, Sensitivity, Nutrion, Excertion, Respiration And growth
