I need to lose 2 stone but am trying for a baby

My friend has been trying for a baby for a long time and over the years has eaten her way throuh the depression of it not happening.

Now she is entering the medical treatment to try for a baby and need to lose 2 stones, we usually opt for a no carb diet when we are trying to drop the pounds, but have been advised this would not be suitable while trying to conceive.

So, does anyone know a good diet that is well balanced that works that we could try.

AuntyP