What would happen if fertilization occurred normally but the corpus luteum did not produce progesterone?

If fertilization occurs but the corpus luteum fails to produce progesterone, the uterine lining would not be properly maintained. Progesterone is essential for preparing the endometrium for implantation and sustaining an early pregnancy. Without adequate progesterone, the uterine lining would likely shed, leading to a miscarriage or failure of the embryo to implant successfully. Consequently, the embryo would not survive, resulting in the loss of the pregnancy.