Final answer:
Tetralogy of Fallot is not associated with polyhydramnios as it is a fetal condition, so the correct answer is 'c. Tetralogy of Fallot'. Polyhydramnios is typically associated with other maternal conditions such as diabetes mellitus or fetal conditions like macrosomia.
Step-by-step explanation:
The condition of having either too little amniotic fluid (oligohydramnios) or too much (polyhydramnios or hydramnios) can be indicative of various complications during pregnancy. Among the maternal conditions associated with polyhydramnios, potential causes include diabetes mellitus, which can lead to excess amniotic fluid due to increased fetal urination; and fetal macrosomia, where a larger-than-normal fetus produces more urine, thus increasing amniotic fluid volume. However, tetralogy of Fallot—an unrelated cardiac anomaly of the fetus—does not directly cause polyhydramnios. Rh isoimmunization, on the other hand, relates to a condition called hemolytic disease of the newborn (HDN), where maternal anti-Rh antibodies attack fetal Rh positive red blood cells, but is not recognized as a cause of polyhydramnios.
In summary, of the given options, tetralogy of Fallot is not associated with polyhydramnios, as it is a congenital heart defect that affects the fetus rather than a maternal condition leading to an excess of amniotic fluid.