Objective — to determine the prevalence of chromosomal abnormalities among good- and excellent-quality embryos and to reveal a correlation between morphological embryo quality assessment and a karyotype abnormality in abortion material. Material and methods. 76 samples from the abortion material obtained during non-developing vitro fertilization (IVF) pregnancies and 157 similar samples obtained during uterine cavity curettage for non-developing spontaneous pregnancies in 2012 to 2015 were analyzed. Chromosome specimens were prepared using a direct material processing method. The specimens were stained with GTG banding. The quality of embryos in the IVF cycles resulting in a miscarriage (n=133) or the birth of a healthy baby (n=97) was taken into account. Results. The proportion of chromosomal abnormalities in the abortion samples after non-developing IVF pregnancies was 43%. That after non-developing spontaneous pregnancies was considerably higher (68%). There were no significant differences the quality of embryos transferred in cases of non-developing IVF pregnancies and in those of IVF pregnancies resulting in the birth of a healthy baby. Conclusion. Karyotyping the samples of abortion material during non-developing pregnancy can reveal one of the genetic causes of miscarriage that accounted for nearly half of the cases, indicating the importance of carrying out this analysis. To choose embryos for transfer only according to morphological criteria does not need to lead to the birth of a healthy baby: the investigation revealed no significant differences in the quality of transferred embryos in successful and unsuccessful IVF cycles. Preimplantation genetic diagnosis may be performed to obtain additional information on embryo quality. The authors declare no conflicts of interest.