Explain the relationship between the sarcoplasmic reticulum and the transverse tubules

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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other information encoded in your genes might distinguish you from the others in the group