Health Status of Children Born After Assisted Reproductive Technologies

The goal of this observational study is to study the features of psychophysical development and the morbidity patterns of children born after assisted pregnancy, and to identify the connection with the health status of mothers, followed by the development of a prediction model and general principles of management of children born after ART. The main questions it aims to answer are: • the influence of premorbid background of mothers on children's physical development, disease occurrence and morbidity patterns of children born as after ART. * To identify the indicators of cellular and humoral immunity in children born after different oocyte fertilization methods in IVF programs (classical IVF or ICSI). * To study the long-term effects of ART on the endocrine status of children. It will be studied hemogram examination, immunity indicators (cellular components CD3, CD4, CD8, CD16, CD20, CD25, CD95, CD3 HLA DR+, CD# HLA-DR; humoral components - IgM, IgA, IgE, IgG) and laboratory investigations in endocrine system (TSH, free T3 and T4 levels, insulin, insulin-like growth factor-1 (IGF-1), somatotropic hormone (STH); glucose, potassium, sodium) in 120 children born after ART. Researchers will compare 132 children conceived spontaneously to see if ART can influent on the health status in future.