Originally Posted by
atomic sagebrush
High dose folic acid doesn't actually sway twin. It may help both twins to survive the first trimester by providing adequate folic acid for both of them.
I do like you guys to take extra folic anyway. But 4000 is a LOT and is generally only given to women with a history of neural tube defects. I would have you wean back to 2000 and it may be best if you take folate instead of folic acid.
The reason not to do keto when you are TTC is twofold - firstly because we simply do not know it's safe. There is evidence that doing it when pregnant may be harmful to the baby's mental development and we don't know how long the effects of the diet last. It's all just not at all studied. And secondly because we have found people on very low carb diets have not gotten pregnant when they really should have (like, people with a history of getting pregnant easily did not get pregnant on keto and then got pregnant once they stopped) and it can disrupt the menstrual cycle for some people.