Ive noticed that two of my fantails have gotten really huge in the past couple of months, and these i think are females going by the chasing thats being done.

They havent released any eggs and im a bit worried about them wintering in the pond full of eggs.

Should i bring the two girls in when November comes or can the females go through the winter hibernating with eggs in them?
I dont want the eggs causing a bacterial disease but could they also provide the fish with needed food absorbtion?