Describe the developmental cycle of the egg.

From the 1st to the 5th day of the cycle, the endometrium of the uterus is rejected due to the death of the previous egg, while the hypothalamus gives the command to the pituitary gland and gonads to release sex hormones that stimulate the development of a new follicle from 5 to 7 days. From the 7th to the 14th day, the follicle matures, secreting the hormone estrogen, which causes the development of the egg and the proliferation of the endometrium of the uterus. Approximately on the 14th day, ovulation occurs (the release of the egg from the follicle) and until the 21st day, a corpus luteum develops in place of the egg, synthesizing the hormone progesterone, which prepares the uterus for implantation of the ovum. On the 21st day, the maximum activity of the corpus luteum is observed, and later, if fertilization has not occurred, the corpus luteum is destroyed, the egg cell dies, and on the 28th day the endometrium of the uterus is rejected.

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