Final answer:
The luteal phase prepares the uterus for pregnancy by thickening the lining and inhibiting further follicle development.
Step-by-step explanation:
The purpose of the luteal phase in the female reproductive cycle is to prepare the uterus for pregnancy.
During the luteal phase, a structure called the corpus luteum is formed in the ovary. The corpus luteum produces hormones such as estrogen and progesterone.
Progesterone helps thicken the lining of the uterus (endometrium) in preparation for implantation of a fertilized egg. It also inhibits the release of further follicles from developing, ensuring that only one egg is released at a time.