Please continue to take folic acid or folate as recommended.
The recommendations for folic/folate supplementation while swaying are as follows.
For BLUE: 2000 mcg (including amount in prenatal) daily starting right away and continuing thru 12 weeks of pregnancy, then gradually wean off to amount in prenatal by spacing doses further and further apart.
For PINK: 1200-1600 mcg (including amount in prenatal during pregnancy) daily starting right away and continuing thru 12 weeks of pregnancy, then gradually wean off to amount in prenatal by spacing doses further and further apart.
That new study that people are reporting on, involves women with high levels of folic/B12 in their blood AT TIME OF BABY'S BIRTH. And it is not at all clear if this is anything to do with supplementation at all, or (much more likely) some sort of genetic inability to excrete these nutrients properly. The guidelines for folic/folate prior to conception and during first trimester has not changed and I do not want ANYONE stopping folic/folate suddenly especially during pregnancy, out of a misguided sense of fear over a study that is being misreported.
I assure you that I and many other women with history of having kids with neural tube defects took much higher doses than what we recommend here, and have kids that are NOT autistic. Everyone must take at the barest minimum, 400 mcg. Folic/folate is the one supplement that has been 100% proven to prevent birth defects when taken before conception and some data even indicates that it may even help to prevent chromosomal abnormalities as well.
The Facts About Folate and Autism - The Atlantic