A subject has the following results of an exercise test: 
Which of the following best describes these findings?
Definitions:
Blastocyst
An early stage of embryonic development characterized by a hollow sphere of cells, which implants into the uterine wall as part of pregnancy initiation.
Endometrium
The mucous membrane lining the interior of the uterus, which thickens during the menstrual cycle and is shed if pregnancy does not occur.
Granulosa Cells
Granulosa Cells are the somatic cells within an ovarian follicle that surround the developing oocyte, playing a key role in its development and hormone production.
Corona Radiata
A layer of cells that surrounds the ovum and sperm cells must penetrate during fertilization.
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