A pregnancy that occurs during the 2nd dose of Hepatitis B vaccination can continue. After vaccination, you need to observe your own signs and the activity of the fetus. Hepatitis B vaccine means injecting attenuated or inactivated pathogens directly into the body, so as to stimulate the immune system to produce corresponding antibodies, improve the body’s resistance to the hepatitis B virus, and reduce the chance of infection. Hepatitis B vaccination and pregnancy do not directly conflict with each other, and the drug components of the vaccine will not cause direct damage to the health and development of the fetus. If a woman becomes pregnant during the vaccination period, she should take the first obstetric examination in time to determine the development of the fetus and the implantation status of the fertilized egg. During the subsequent vaccination, women should pay attention to the body signs 24 hours to 72 hours after vaccination to avoid adverse reactions such as allergy or fever. If a woman becomes pregnant during the vaccination process, she should consult her doctor to determine whether the pregnancy can continue.