Hey doc ,am 8 month pregnant and my baby move when...

Is it normal to have the previous notes?
Usually the mother can feel the movement of the fetus at the of 16-25 weeks. It is often related to the arrangement of the pregnancy and the experience of the mother. In the next pregnancy, the mother can determine the movement of the fetus at a younger age.
The above notes are ususally normal , as long as the evaluation is good with the doctor through periodic examination, and if a specific problem is discovered, the treatment is to treat the existing problem and it varies from one woman to another.
 examinations:
usually doctor will do  the necessary tests, including blood tests for the mother, in addition to sugar and organ functions, and doing an ultrasound examination of the fetus.
What are the reasons for not feeling the movement of the fetus at the age of 21 weeks
The reasons vary, including:
Inexperience of the mother
The location of the fetus, if it is between the child and the stomach, may delay the feeling of movement
Lack of water on the fetus
The mother's weight, the obese mother may delay the sense of movement.
Advice:
periodic visit to the doctor.