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. 2018 Aug 13;4:16. doi: 10.1186/s40813-018-0093-6

Fig. 1.

Fig. 1

Fertilization and blastocyst assessment by Hoechst-MTT stain. Viable zygote (a, b), viable blastocyst (c, d) and dead blastocysts (e, f). Images were obtained under an epifluorescence microscope with 400X magnification. PBs polar bodies, PN pronucleus, N nucleus