Effect of Nutritional Status During Lactation on Puberty Onset Time of Mouse

Inbred mice BALB/c was applied in this paper to investigate the effects of nutritional status on the puberty timing of mouse after birth until weaning,indicated by vaginal opening(VO) in female or balano preputial separation(BPS) in male,respectively.The mice were divided into three groups as over nutrition(ON), balanced nutrition(BN) and under nutrition(UN) according to the number of pups lorn per mother.The order of puberty timing for female mice is: ONBN>UN.Nutritional status of lactation has significant effects on puberty onset time of mouse,whereas the way of effection is different between male and female.