Answer:Here’s what typically happens:
1. After fertilization of the egg by sperm in the fallopian tube, the fertilized egg undergoes several cell divisions, forming a blastocyst. This blastocyst then travels down the fallopian tube towards the uterus and eventually implants itself into the uterine lining (endometrium).
2. Upon implantation, the developing embryo signals the body to continue producing hormones essential for maintaining the pregnancy. Specifically, the embryo secretes human chorionic gonadotropin (hCG), which prevents the breakdown of the corpus luteum.
3. The corpus luteum, which is the remnant of the ovarian follicle that released the egg, continues to produce progesterone and estrogen. These hormones support the thickening of the uterine lining, ensuring a nurturing environment for the developing embryo.