[Functional activity of the complement system during uncomplicated gestational process]. / Funktsional'naia aktivnost' sistemy komplementa v dinamike neoslozhnennogo gestatsionnogo protsessa.

This study has demonstrated functional activation of complement components C1 to C5 during gestation. The C1 component increased in the first trimester (6-8 weeks). Other components changed with critical phases of fetal development.