Like most other rodents, the squirrel is generally closed except for the opening of the vaginal opening during the breeding period, so it is not easy to distinguish sex from the appearance. In production practice, we can use the following methods to distinguish:
The distance between the anus and the vulva is about 1/3 longer than the distance between the anus and the urethral process.
Male and female squirrels, female genitalia, male, female, male, perineal, hair, and female, perineal, hair, sparse, especially near the rear of the urethral process, with distinctly bald areas. This feature is more pronounced in adult females.
The urogenital hole is turned to identify the moth, and the thumb and index finger press the sides of the urogenital hole to make it eversion. If the purple-red round glans can be exposed, it is a male mouse, and the mother mouse has a pink hole. The method can be used for identification of pups after 1 month of age.
The direction of urination and characteristics of the urine to identify the direction of urination of male head to multiple directions, while the mother is more than the direction of the hip urination; male rats after urination, the urethra retained thick odor milky secretions, the mother does not have this feature.
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