I had taken Spring Valley Folic Acid 400 Mcg tablets during my first two pregnancies. I have a cousin who has Spina Bifida, so my OBGYN recommended that I take folic acid during my pregnancy. Folic acid helps make DNA, RNA, amino acids and red blood cells. So by taking folic acid while your pregnant ensures proper growth for your baby and it also can help prevent your baby being born with having certain spinal defects, like spina bifida. I am currently taking Folic Acid again. My husband and I are planning on having our third child within the next year and doctors recommend that Women should start taking folic acid before conceiving as well as after conceiving to help prevent such spinal birth defects. So I am currently taking Spring Valley folic acid 400mcg and I am going to keep taking folic acid until we have our third child. I recommend every pregnant women to take Folic Acid while they are pregnant, because nothing is more important than a healthy pregnancy and baby.