Более подробную информацию вы можете прочитать в исследовании S. Golombok, C. Murray, V. Jadva, E. Lycett, F. MacCallum, J. Rust, Non-genetic and non-gestational parenthood: consequences for parent-child relationships and the psychological well-being of mothers, fathers and children at age 3, Human Reproduction, Volume 21, Issue 7, Jul 2006.