P - Ped

Per - Pin

Pix - Poi

Pol - Pri

Pro - Py

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Progesterone: A steroid hormone, C21H30O2, secreted by the corpus luteum of the ovary and by the placenta, that acts to prepare the uterus for implantation of the fertilized ovum, to maintain pregnancy, and to promote development of the mammary glands.

Protein: Any of a group of complex organic macromolecules that contain carbon, hydrogen, oxygen, nitrogen, and usually sulfur and are composed of one or more chains of amino acids.

Puberty: The stage of adolescence in which an individual becomes physiologically capable of sexual reproduction, typically occurring between the ages of 6 and 12 months in cats.

Purebred: A cat whose sire and dam belong to the same breed and who are themselves of unmixed descent since recognition of the breed.

Pyometra: An accumulation of pus in the uterine cavity.