Research of personality features of 5-6 year old children, who lost their twin during the first trimester of pregnancy

The article inquiries into a problem of «vanishing twin phenomenon» and its psychological consequences. The timeliness of this issue is caused by a considerable amount of occurrence of such a phenomenon 25-30 years ago, which was recorded in the medical data of that time. The authors represent the results of a research of personal features of over-five children who lost the twin during the first trimester of pregnancy.