The birth registration of the only child is the birth certificate of the first child, which can be handled if it meets the policy, and cannot be handled if it does not meet the policy. This is the difference between one-child registration and family planning service certificate. If you are pregnant for 7 months, you must start the maternity insurance process with this certificate. After marriage, if both men and women want to have children, they must first apply for a family planning service certificate. When giving birth to a child, relevant departments should check it, such as hospitals and family planning departments. This certificate is equivalent to a business license. With this family planning service certificate, it means that the state recognizes the legitimacy of childbirth.