What hormonal changes occur as a result of implantation?

During implantation, the embryo releases human chorionic gonadotropin (hCG), which signals the corpus luteum to continue producing progesterone and estrogen. This hormonal shift helps maintain the uterine lining, preventing menstruation and supporting early pregnancy. Increased levels of progesterone also promote uterine relaxation and prepare the body for fetal development. Additionally, other hormones may be influenced as pregnancy progresses, but hCG is the key hormone immediately following implantation.