Hi, I'm currently taking Folic Acid, it helps to prevent birth defects particularly in the brain and spinal cord, rather than helping TTC. It's recommended to start taking while you are TTC so that you are taking it from the moment of conception, then continue for first 12 weeks of pregnancy (possible at a higher dosage). It's especially important for me as I have epilepsy - it's been under control for 9 years and I don't take any medication, but this put me at a slightly higher risk, which is why my GP recommended I take the supplement, but the advice from DH is that all women who are TTC should be taking folic acid to make sure they are covered in those first few days before we get our BFPs.
Hope that helps.
Toni.