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While there is limited data on the effects of COVID-19 vaccines on fetal development, available evidence suggests that vaccination during pregnancy is unlikely to pose significant risks to the fetus and may provide protection against COVID-19-related complications.

"The role of hyperhomocysteinemia as well as folate, vitamin B(6) and B(12) deficiencies in osteoporosis: a systematic review"

When it is deficient, it can cause folic acid deficiency, which can lead to DNA synthesis obstacles and affect the development and maturation of red blood cells

Journal of Clinical Pharmacy and Therapeutics, 47(4), 543-556

National Academies Press (US).