So- I did a lot of literature research on this (and I’m an ER doc- not an OB- but we deal with a lot of miscarriages), and discussed it at length with my OBs- the consensus was that, barring specific medical issues, there’s no reason you need to wait. The highest conception rates after miscarriage are within the first 3 months. Obviously if you’ve had physical or mental health complications, molar pregnancy, or damage to your uterus- that can be changed. But the old advice of “wait x months” is now on the out for the average, healthy patient.

So, it probably depends a lot on your doctors, and I’d make sure that there’s no specific reason they want to make you wait. I will be honest, I don’t know with NTD if they want you to “build up” your folic acid, but I would definitely ask your doctors for specifics and ask for any papers/scientific evidence that this is the case.