Pregnant?

Question
I have a male and female black dwarf rabbit.Both are 3 - 5 years old. The female supposedly was neutered 2 years ago. The male I had neutered 2 months ago. The female has increased in size and weight. This past week she has been aggressive with me during feeding; she claws me - she has never done this behavior before. If this is a real or false pregnancy, How long does it last? Will it happen again? Why does it happen?

Answer
hi stephen if she has been spayed  it is a false one and could last about 3 weeks but if you are not sure she was done it may be she is pregnant -she is showing all the classical signs.but as your buck is neutered i suspect a false one and yes it could occur again -nobody has anyanswers why it happens but most does go through it.
dave.