Thanks for your query.
Ig G against rubella
is non specific and indicates past infection and immunity against the disease.
THe IgM indicates active infection.
Your IgM levels are quite low.
I think you need not worry about Rubella as far as your abortions are concerned.
You are already immune to it.
There is no scope for vaccination
There could be various causes of abortion such as genetic causes, autoimmune disorders
, abnormalities in uterine shape and size, other infections etc.
You need to have a complete analysis of the fetus and the placenta to know the exact cause.
Meanwhile consult a High Risk pregnancy
specialist, have complete evaluation done, and take regular folic acid
supplements for 3 months before planning a pregnancy.