Effect of Covid-19 Vaccines on Lactation

Abstract

Background: Pregnant and breastfeeding women were among the first to question the vaccine’s effects, especially on their lactating ability, given the fact these group of women were not included in the clinical trials of any vaccine. The confusion was exacerbated due to the fact that no study has clearly answered the question of safety of the vaccine on lactation. Methods: A complete literature search using seven databases including: PubMed, Academic Search Ultimate, AccessMedicine, AccessObGyn, Clinical Key, Medline, and ScienceDirect. Eligible studies published since March 11, 2020 till August 20, 2022 were considered Additionally, our paper aimed to tackle the effects on lactation upon administration of Covid-19 vaccines including but not limited to: Pfizer, Moderna, AstraZeneca, Sputnik, Johnson & Johnson, and Sinovac. The research conducted aimed to look over articles that showcase all the potential and possible complications that could have been the result of available Covid-19 vaccines at the time. Results and Discussion: After applying inclusion and exclusion criteria, and further reading and analysis across the listed databases, 29 articles were selected to proceed with this literature review. This literature review resulted in a paradox since many articles claim that vaccines have no adverse side effects on lactating women, while others argue the presence of some contradicting findings and effects that negatively impact lactation following administration of the Covid-19 vaccine. Conclusion: Further tailored and targeted studies that revolve around pregnant women, are needed to confirm current findings and dilemmas, using trusted rigorous methodologies.