There should be more studies on human germ line cells regarding the H3K4me3, H3K27me3, H3K9me2 and H3K9me3 in human fetal germ cells. Research indicates that H3K4me3 and H3K27me3 might be associated with the undifferentiated status in human fetal germ cells. Using this as a focal point further research should be undertaken about H3K27me3 if they are involved in the repressions of the developmental genes. It was found from this research that the dynamic change of H3K9ac during human fetal germ cell development is observed. However the results indicated are currently not reliable. Further research should be undertaken by analysis of the human fetal germ cell during gestation period by using the techniques of western blotting and protein extraction. It has been established from this results and the previous studies that there is an important role of 5hmC in human germ cell development. Further research is required to understand the implications of 5hmC in the human germ cells. This can be determined by using the techniques of hmeDIP-Sequencing and glucosyltransferase-quantitative polymerase chain reaction. The relationship between DNA demethylation and meiotic prophase I in human fetal ovaries needs to be probed further it has been found from this research that the DNA demethylated human fetal gonads can be cultured with RA for a longer period and the expression of meiotic genes. This can lead it to being detected further and will enhance in understanding how they will impact the meiotic prophase I in human fetal ovaries TET I. And histone acetylation can also be probed in future mechanisms. Testicular cancer epigenetic control can be understood by future research. This can be devised by developing a mechanism.