For each potential prescription from the provider, click to specify if the potential prescription is anticipated, nonessential, or contraindicated for the client.

Choice A rationale

At 9 weeks gestation, the primary purpose of an ultrasound is to confirm the presence of a fetal heartbeat, which indicates a viable pregnancy.

Choice B rationale

Chromosomal defects are typically assessed using different tests, such as chorionic villus sampling or amniocentesis, rather than an ultrasound at this early stage.

Choice C rationale

Fetal lung maturity cannot be assessed at 9 weeks gestation because the lungs are not yet developed. This assessment is usually done later in pregnancy if preterm delivery is anticipated.

Choice D rationale

The position of the fetus in utero is not a concern at this early stage of pregnancy. Fetal positioning becomes relevant later in pregnancy, closer to delivery.

Choice A rationale

Blood returning to the right atrium from the pulmonary system is consistent with adult circulation, not fetal circulation. In fetal circulation, blood bypasses the lungs via the ductus arteriosus and foramen ovale since the fetus receives oxygenated blood from the placenta, not the lungs.

Choice B rationale

Blood is returning to the placenta via the umbilical arteries. In fetal circulation, deoxygenated blood is carried from the fetus to the placenta through the umbilical arteries. This is consistent with normal fetal circulation as the placenta is responsible for gas exchange.

Choice C rationale

Blood being shunted to the right side from the left side of the heart is incorrect. In fetal circulation, there is a right-to-left shunt through the foramen ovale, allowing blood to bypass the non-functioning fetal lungs and go directly into systemic circulation.

Choice D rationale

A right-to-left shunt is not seen between the umbilical arteries. Instead, the shunts in fetal circulation are the ductus venosus, ductus arteriosus, and foramen ovale, which help reroute blood away from the fetal lungs and liver.