🧬 The Felid Wiki — 3,000 research summaries

This study validated and applied fecal steroid hormone assays to track ovarian activity in multiple felid species without restraint or blood sampling. The authors characterized how estrogen and proges…

Brown JL, Wasser SK, Wildt DE, Graham LH · Biology of Reproduction · 1994

This review compiled what was known about reproductive hormone patterns across the cat family, drawing heavily on noninvasive fecal and urinary steroid monitoring developed for zoo animals. The author…

Brown JL · Theriogenology · 2006

Gonadotropin-releasing hormone and its agonists are used to induce ovulation in cats by stimulating the pituitary to release luteinizing hormone, substituting for the natural mating stimulus. This ove…

As cats age, their reproductive output typically declines through reduced fertility, smaller litters, and lower offspring survival. This overview surveys patterns of age-related fertility decline acro…

Pregnancy rates from artificial insemination in wild cats remain modest and variable, reflecting the biological and technical challenges of the procedure. This overview surveys reported success rates…

When some individuals in a group reproduce while others are suppressed, the resulting asymmetry reflects social and physiological mechanisms regulating reproduction. This overview surveys asymmetric r…

Managing captive felid populations requires balancing genetic goals, such as retaining diversity, against demographic goals, such as maintaining stable numbers and age structure. This overview surveys…

Successful reproduction in captivity depends not only on physiology but on appropriate behavior, including mate recognition, courtship, and competent maternal care. This overview surveys how behaviora…

Female cats select sheltered den sites to give birth and protect altricial young during their most vulnerable weeks. This overview surveys how felid mothers choose dens that provide concealment and th…

In felids housed or living in groups, social rank can influence which individuals reproduce and how successfully. This overview surveys how dominance hierarchies relate to reproduction in cats, includ…

Collecting semen from nondomestic cats usually requires electroejaculation under anesthesia, a standardized technique that allows evaluation and banking of sperm. This overview surveys how electroejac…

Freezing embryos preserves them for future transfer, allowing the genetics of valuable matings to be stored and used across time and space. This overview surveys methods for cryopreserving felid embry…

The physical environment of an enclosure, including space, complexity, seclusion, and the ability to avoid disturbance, influences the reproductive function of captive cats. This overview surveys how…

The interval between successive estrous periods varies considerably among cat species and depends on whether ovulation has occurred. This overview surveys data on follicular phase duration, interestro…

Measuring estrogen metabolites in feces allows researchers to follow follicular development and estrus in cats without restraint or blood collection. This overview describes how fecal estrogen profile…

Measuring glucocorticoid stress hormones in feces provides a noninvasive way to assess how stress relates to reproductive function in cats. This overview surveys the use of fecal glucocorticoid monito…

Whether semen is used fresh or after cryopreservation strongly affects the success of artificial insemination in cats, since freezing damages a fraction of sperm. This overview surveys comparisons of…

Genome resource banks, sometimes called frozen zoos, store gametes, embryos, and cells from felids to preserve genetic diversity for future use. This overview surveys the concept and practice of bioba…

Preserving ovarian and testicular tissue offers a way to bank the gametes of immature or recently deceased felids whose mature sperm or eggs cannot be collected directly. This overview surveys researc…

Human chorionic gonadotropin mimics luteinizing hormone and is widely used to trigger ovulation in felids after follicular development has been stimulated. This overview surveys how the hormone is adm…

The conditions under which felid embryos are cultured after fertilization strongly affect how many develop to stages suitable for transfer or freezing. This overview surveys research on in vitro cultu…

Applying in vitro fertilization to endangered cats aims to produce embryos from valuable individuals, including those that cannot breed naturally, for transfer to surrogates or for banking. This overv…

Inbreeding in small captive populations can reduce fertility, increase juvenile mortality, and cause physical and reproductive abnormalities, collectively termed inbreeding depression. This overview s…

Most cats are induced ovulators, meaning that the surge of luteinizing hormone needed to release eggs is triggered by the physical stimulation of mating rather than occurring spontaneously on a fixed…

Induced ovulation is widespread but not universal among carnivores, and comparing felids with mustelids, some canids, and other groups clarifies how the mechanism evolved and varies. This overview sur…

Depositing semen directly into the oviduct or uterus via laparoscopy bypasses cervical barriers and improves the odds of fertilization in cats with limited sperm quality. This overview surveys the dev…

Litter size in cats varies within and between species, influenced by maternal age and condition, resource availability, and species biology. This overview surveys typical litter sizes from small felid…

Captive cats often live longer than their wild counterparts, raising questions about how reproductive performance changes across an extended lifespan. This overview surveys data on longevity and repro…

Mean kinship is a central metric used to decide which captive cats should breed in order to preserve genetic diversity. This overview surveys how mean kinship, the average relatedness of an individual…

Microsatellite genetic markers have made it possible to assign parentage in wild and captive cats, resolving questions about mating systems that behavior alone cannot answer. This overview surveys the…