I tried to tell someone who had like 6 females and one male about this around november she didn't listen and guess what she found 2 litters of dead babies. she then thought hey, I will separate the male but by this time all 6 females were pregnant, now some babies survived from the 6 litters but not all. and then I am not sure what happened but they all got Cocci and as of now I have no clue how many of her rabbits died.
they get aggressive when babies come in to the mix and leaving the male in with them is a huge chance that he will kill all the babies. other females will do the same thing. if you want the babies to survive please separate. I took 4 rabbits off the lady I was just talking about. mine survived and I brought them in from the cold, she had them in a stall in a barn with no top, and well barn cats tend to get in there and have been known to kill some babies, chew some up and then leave them there. I know because I saw one of them the day I went to pick up my 4 bunnies. If I hadn't taken in these 4 they would be dead already.