Can't accurately sex them until they're 2" to 2.5" SVL(Snout to Vent Length). Males will begin to call(croak) and develope Nuptial pads on their thumbs. Females are mostly quiet and have no real defining features at this size except slight skull structure difference and lack nuptial pads. Females tend to grow a little slower and will become larger than the male due to sexual dimorphism.

I'm glad they have recovered well. Enjoy your new babies.