During the preconception phase, the nurse should teach about which infectious diseases as risk factors for maternal complications? (Select all that apply).

Choice A rationale:
Inspiratory stridor. Inspiratory stridor, a high-pitched sound heard during inhalation, is a common symptom of acute epiglottitis. It is caused by the swelling and inflammation of the epiglottis, which can partially obstruct the airway and create a stridor sound during breathing.
Choice B rationale:
Complete obstruction. Using a tongue depressor to examine the throat of a child with acute epiglottitis can potentially lead to a complete airway obstruction. The epiglottis, which is already swollen, can block the airway entirely, leading to respiratory distress and potentially a life-threatening situation.
Choice C rationale:
Sore throat. A sore throat is a common symptom of various respiratory tract infections, including acute epiglottitis. However, the use of a tongue depressor can worsen the swelling and potentially lead to complete airway obstruction, which is a more immediate concern.
Choice D rationale:
Respiratory tract infection. Acute epiglottitis itself is a severe respiratory tract infection, specifically involving the epiglottis. Using a tongue depressor might exacerbate the condition, leading to airway obstruction, but it is not the cause of the respiratory tract infection.

Choice A rationale:

Rh incompatibility occurs when an Rh-negative mother is exposed to Rh-positive fetal blood, leading to the development of antibodies against Rh-positive blood cells. In this scenario, the infant of an Rh-negative mother and an Rh-positive father who is heterozygous for the Rh factor (Choice C) is more likely to have Rh incompatibility. This is because there is a higher chance that the fetus will be Rh-positive, and the mother, being Rh-negative, may produce antibodies against the Rh-positive cells of the baby, causing hemolytic disease of the newborn.

Choice B rationale:

If both the mother and the infant are Rh-negative (Choice B), there is no Rh incompatibility, as there is no Rh-positive blood to trigger an immune response in the mother.

Choice D rationale:

If both the mother and the infant are Rh-positive (Choice D), there is also no Rh incompatibility, as there is no Rh-negative blood to cause an immune reaction in the mother.