Why are licensing and certification requirements important? what benefit do they have?

Licensing and certification are important requirements because, If you are not licensed to do a certain job, it is considered as an illegal thing to do. Unless the work you have doesn't require you any type of license. Certifications are just badges or just a type of thing that gives you credentials and proves that you are fit to do such job.

Childbirth, the process of delivering a baby and the placenta, membranes, and umbilical cord from the uterus to the vagina to the outside world. during the first stage of labor (which is called dilation), the cervix dilates fully to a diameter of about 10 cm (2 inches).