Yes.
If a 32-year old male is in the AB plus blood group, he can marry a 35-year old female that is in the O blood group without having any problems in pregnancy.
o+o+o = o
There should not be a problem during pregnancy because of a difference in blood type.
yes
No
no
No!
If mom is O- and dad is O+, then the baby can either be O- or O+
normally they have "o" plus or negative.
No, blood can't change type during pregnancy.
Gravid/o is nomenclature to illustrate pregnancy. A Gravid/o cardiac would imply a pregnancy with special attention to heart issues.