Safety is high, external fertilization and culture of the human embryo which, can be able obtain the fertilized egg whose quality is good raise pregnancy ratio the culture solution. As for the culture solution for this culture, although it fertilizes the spermatozoon and the ovum of the person, although the human embryo to 16 cell periods is cultured from the 1st culture solution and after the fertilizing, are used although, with the 2nd culture solution which is used and the human embryo to blastodermic vesicle period is cultured from morula stage the 3rd culture solution which is used it has. The 1st - 3rd culture solution, contains glucose, the lactate and the pyruvic acid salt, at the same time clearly it is bloodless. Glucose density the 1st culture solution is highest, the 2nd culture solution is lowest. Lactate density and pyruvic acid salt density the 3rd culture solution are lowest.
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