Why the vitamin c, iron, vitamin D and calcium doesnt need to be digested before they are absorbed

They flow through the blood stream.

Explanation:

They are absorbed because your body consists of mainly water, many of the water - solute vitamins circulate easily in your body

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.

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