If your cat doesn`t get pregnant or, even worse, loses her kittens within the first 5 weeks then give, after mating (!) :

Viburnum opulis 30x (or 30c or 30k), one dose twice a week for 4 weeks.

Also give afterwards Caulophyllum 30x (or 30c or 30k), also twice a week for 4 weeks.

Start from the 50th day of the pregnancy with Pulsatilla 3c (or 4x or 6x), one daily dose.

Give Arnica 30x (or 30c or 30k), 3 times daily on the last 2 days before the cat delivers the kittens.

Wim

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Homeopath for people and animals.
(Sorry, Wim no longer works here.)