My cat had her first litter of kittens she had four all healthy her second litter all died they were premature she had 7 what could be the cause of this

She just had a bad litter with too many babies :( poor sweetie usually kitties 2nd or 3rd litter will have problems I would not try again just in case

Please get her spayed. This is very hard for her and hard on her body. She will live years longer once she's spayed.