The impacts and side effects of a third dose of the COVID vaccine in pregnant women are generally considered to be safe and recommended. Vaccination is recommended because pregnant women are at a higher risk of complications if they contract the disease. Common side effects of the vaccine are typically mild, such as body aches, fever, and temporary fatigue. So far, there have been no major complications associated with the vaccine in pregnant women, including miscarriage or premature labor. Having a third dose is more effective in protecting against the Omicron variant and reducing the risk of both getting the virus and experiencing severe complications from it.