yes it will and i suggest you get a good ferret breeding/ rearing book to read up fast on what else you need to know.. they will be born approx 42 days after mating. http://www.amazon.co...y/dp/190405756X
If the jill has been mated the swelling will go down but as Leeview has said it doesn't mean she will be pregnant, after all if she was mated
by a vasectomised hob the swelling would go down but you'd be a bit p!ssed if she was pregnant.
That said there'll be a good chance that she will be pregnant.
Agree fella, its the act of copulation ( getting mated ) that takes the