Board Thread:General Discussion/@comment-3486995-20151205162354/@comment-6175354-20151206013332

CoolDudeAl wrote: Women can fly till like the last month of their pregnancy. Furthermore, Lily is the easiest pregnancy to hide, because she was probably not going to be in that many episodes anyway. Very true.... but it all depends on the individual case. Some women cannot travel due to complicated pregnancies.

However, Belle is being (temporarily) written off the show. If Lily does resurface in 5.B, it will only be for one or two episodes. Unless OUaT makes Hades (or some random dead guy) her father, there really is not any reason to include her this season.