Consider the following statements about the phases of the human menstrual cycle. Which one/ones is/are correct?

• Statement I: During the follicular (proliferative) phase, the growing Graafian follicle secretes estrogen, which causes the uterine endometrium to regenerate and thicken.
• Statement II: During the luteal (secretory) phase, the corpus luteum secretes progesterone, which further prepares the endometrium to receive and support a possible embryo.