How are respiration and cellular respiration related?

breathing is also known as respiration when you breathe in oxygen that your cells need for cellular respiration also when you breathe out carbon dioxide that your cells produce during the cellular respiration.

Explanation:

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the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.