And the corpus luteum is essentially an endocrine gland that continues to release different types of hormones that are responsible for maintaining the thickening, the thick layer of that endometrium inside the uterus. And this is in the case that when the sperm cell fuses with the XL, we form the zygote and the zygote eventually implants onto the uterus. Now, if there is a sperm cell found inside our philopium tube, it basically combines it fuses with our secondary OSI. And as soon as the interaction between the sperm cell and the secondary OASI takes place, as soon as contact takes place, our secondary OSI and metaphase two of meiosis will finish meiosis two and it will form the mature ovum, the mature xcel. And at that point, the membrane of the two cells fuses, the nuclei essentially fuse and the diploid number of that organism is restored. So the sperm cell contains a haploid number, 23 chromosomes that came from the male parent.