Annual Weather Averages in Pudahuel. Pudahuel is 54 miles from ValparaÃ­so, so the actual climate in ValparaÃ­so can vary a bit. All Year Climate & Weather Averages in ValparaÃ­so. January Climate & Weather Averages in ValparaÃ­so.
Human chorionic gonadotropin (hCG, or human chorionic gonadotrophin) is a placental hormone initially secreted by cells (syncitiotrophoblasts) from the implanting conceptus during week 2, supporting the ovarian corpus luteum, which in turn supports the endometrial lining and therefore maintains pregnancy.
Answer: Pregnancy tests rely on the presence of the hormone human chorionic gonadotropin (hCG), a glycoprotein that is secreted by the placenta shortly after fertilization.