Because your body never lies. If you are having vague feelings that your heart is not beating correctly or that you are dizzy, that's a true condition. Pay attention.
It is important to listen to your body when playing sports because your body can become dehydrated or too tired. These could cause you to pass out. If you feel thirsty, drink water. If you're tired, take a rest.
A Intrauterine insemination meaning insemination within the uterus. In vitro basically means within a test tube and surrogacy is another woman carrying the child