3. If you observed a cell you have never seen before, what key features would you look for in the sample to distinguish it from other cells? What components (or lack thereof) would give you a clue regarding the identity of the cell?

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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.