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Anogenital distance (AGD) is the distance from the midpoint of the anus to the genitalia, the underside of the vagina, the clitoris or the scrotum. It is considered medically significant for a number of reasons, in both humans and other animals, including sex determination and as a marker of endocrine disruptor exposure. [ 1 ]
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The house mouse is best identified by the sharp notch in its upper front teeth. House mice have an adult body length (nose to base of tail) of 7.5–10 centimetres (3–4 in) and a tail length of 5–10 cm (2–4 in).
The anogenital distance is a measure of the distance between the midpoint of the anus and the underside of the scrotum or the vagina. Studies show that the human perineum is twice as long in males as in females. [9]
In the U.S., the numbers of rats and mice used are not reported, but estimates range from around 11 million [3] to approximately 100 million. [4] In 2000, the Federal Research Division, Library of Congress, published the results of an analysis of its Rats/Mice/and Birds Database: Researchers, Breeders, Transporters, and Exhibitors.
The Old World rats and mice, part of the subfamily Murinae in the family Muridae, comprise at least 519 species.Members of this subfamily are called murines.In terms of species richness, this subfamily is larger than all mammal families except the Cricetidae and Muridae, and is larger than all mammal orders except the bats and the remainder of the rodents.
The albino laboratory mouse is an iconic model organism for scientific research in a variety of fields An SCID Intermediate coat colour Kept as a pet. The laboratory mouse or lab mouse is a small mammal of the order Rodentia which is bred and used for scientific research or feeders for certain pets.
The southern giant pouched rat is a large rodent, with males larger than females. Adult males typically weigh 1.5 to 2.0 kg (3.3 to 4.4 lb), while females weigh 1.2 to 1.6 kg (2.6 to 3.5 lb). The pouches for which these rats are named consist of oversized cheek-pouches.