This paper explores the relation between dissolving quality and particle density of milk powder and obtains the special range of formula milk powder density.

【Method】 45 infants(male 24,female 21)with formula milk and 51 infants(male 27,female 24) with breast milk,were selected and their blood leptin levels and anthropometric parameters were compared in six months of life and in the first year of life.

That were summarized respectively which were the current status of design of veterinary reproduction control vaccines,vaccines against reproductive hormones,vaccines against gamete antigens,and vaccines to increase fertility.