My platies (2 female, 1 male) have spent much of the last week hiding. I think it might be because, when they do come out, the male spends all his time chasing the females. Could this be the reason?
They're not hiding from each other - they're all in the same area.
They all come out for food and seem ok then. Both the females are pregnant but I don't really know how pregnant.
Any advice?
(My tank is 20USG and, in addition to the platies, I have 5 glowlight tetras and 3 bronze cories.)

They all come out for food and seem ok then. Both the females are pregnant but I don't really know how pregnant.

Any advice?

(My tank is 20USG and, in addition to the platies, I have 5 glowlight tetras and 3 bronze cories.)