Which pregnancy-specific structure is responsible for delivering nutrients and oxygen to the fetus and removing waste products?

For the answer to the question above, I believe the answer is "PLACENTA"this organ develops in your uterus during pregnancy.
the placenta provides oxygen and nutrients for your baby's growth and removes away the waste products from the baby.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey