What's the possibility?

Pre-pregnancy, I was a size 0. How common is it to drop baby to the pre-baby size? Just wondering because I've got tons of jeans laying around that I obviously cannot wear right now but if it's unlikely that I'll be able to fit back into them after my daughter is born, I might as well sell them to keep them from collecting dust. I do plan on exercising as soon as I get the all clear to do so but don't wanna keep all of this clothing laying around if it won't be able to be worn. 😂