Final answer:
Progesterone is the hormone responsible for the rise in body temperature during ovulation. It leads to both the thickening of the endometrium and the slight increase in basal body temperature post-ovulation.
Step-by-step explanation:
The hormone responsible for the rise in body temperature during ovulation is Progesterone. After ovulation occurs, progesterone levels increase, which in turn stimulates the endometrium to thicken and prepare for potential implantation of a fertilized egg. This increase in progesterone also causes a woman's basal body temperature to rise slightly.
Luteinizing hormone (LH) and Follicle-stimulating hormone (FSH) play crucial roles in stimulating the maturation of follicles in the ovaries and triggering ovulation, but it is the heightened level of progesterone after ovulation that is directly linked to the rise in body temperature.