Medical reasons for gender selection can also be psychological: a single female may feel better equipped to have a daughter than a son; parents who lost a child may feel a strong need for a child of the same gender.
It is considered that the lining of the stomach is replaced every 5 -10 days due to the highly acidic nature of stomach contents and the need to protect against damage.The process is continual with respect to shedding of cell layers, and there are multiple protective measures to look after the vulnerable surface.t is considered that the lining of the stomach is replaced every 5 -10 days due to the highly acidic nature of stomach contents and the need to protect against damage. The process is continual with respect to shedding of cell layers, and there are multiple protective measures to look after the vulnerable surface.
(If the stomach lining was not continually replaced, hydrochloric acid from the stomach juices would burn a hole in the stomach, which would soon cause death.) Skin replaces itself every 30 days. Every three months we have a new skeleton.The red blood cells have a life span of 120 days, and must then be replaced.Each of the different tissues of the body has its own natural life cycle. It is the aim of regeneration therapy to stimulate the process of self-renewal.If the stomach lining was not continually replaced, hydrochloric acid from the stomach juices would burn a hole in the stomach, which would soon cause death.) Skin replaces itself every 30 days. Every three months we have a new skeleton.