Do you have a problem with implantation? Then, you must do the Serum Progesterone challenge test! This is a blood test that measures the functioning of the corpus luteum, which produces the hormone progesterone. How the hormone progesterone affects implantation? Progesterone controls the development of the lining of the uterus and prepares it for embryo implantation. The enometrium will not sustain the implantation of the embryo if the progesterone production is inadequate.

When to do the test? The progesterone test will be done about 1 to 9 days after suspected ovulation.