An agent for improving the normal incidence of fertilized eggs

摘要

In vitro culture of a fertilized egg provides an in vitro culture medium that normally proceeds to the blastocyst stage without stopping development. As an agent for improving the normal incidence of a fertilized egg, the following formula (I) (wherein R1 represents a hydrogen atom or an acyl group, R2 represents a hydrogen atom, a linear or branched alkyl group, a cycloalkyl group, an aryl group) Or, the normal occurrence rate of a fertilized egg is improved by using 5-aminolevulinic acid or a salt thereof represented by: [Chemical 1]