I'm working on a english multi-part question and need an explanation and answer to help me learn.

Answer the following questions related to the prenatal stage information available in conference and video conference in module ll.

1- What should be the preventive measures that are necessary in the prenatal stage

2- What are the laboratories that are made in the stage of pregnancy

3- Mention the signs and symptoms in pregnancy

4- What are the three diagnostic methods that stipulate that you are pregnant