Welcome GEM
Since you found journals, I trust you are looking around all the various topics in the many sub-forums, though some are easy to miss. There is one on Pregnancy.
http://forum.lowcarber.org/forumdisplay.php?f=95

Not very active, but the first post is one I placed there, is low carb safe during pregnancy? Start reading this article if any concerns how to proceed with the Diet while also doing IVF.
http://forum.lowcarber.org/showthread.php?t=477743
Or Direct: https://www.dietdoctor.com/low-carb/pregnancy


All the best,