Final answer:
The stage of the estrous cycle corresponding with pseudopregnancy is the luteal phase, where the body prepares for pregnancy that does not occur, maintaining high levels of progesterone and exhibiting pregnancy signs without an embryo.
Step-by-step explanation:
The stage of the estrous cycle that corresponds with pseudopregnancy is typically referred to as the luteal phase. During the luteal phase, if pregnancy does not occur, progesterone levels decline as the corpus luteum degrades into the corpus albicans, and the endometrial lining is not maintained, leading to menstruation. However, in cases of pseudopregnancy, also known as false pregnancy, the body exhibits signs of pregnancy such as endometrial thickening and mammary gland enlargement without the presence of an embryo. Although pseudopregnancy primarily occurs in other mammals, it can also be conceptually related to the luteal phase in the human menstrual cycle, where high levels of progesterone temporarily maintain the endometrium.