How many sister chromatids would a cell with 5 chromosomes have?

 If sperm, which is a product of meiosis, contains 5 chromosomes, the normal animal cell contains 10 chromosomes. This means that there are 20 sister chromatids at G2.

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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.