Which diagnostic finding confirms ectopic pregnancy?

Maternal hypertension causes systemic vasospasms that reduce blood flow to the uterine spiral arteries. This chronic hypoperfusion leads to placental insufficiency, characterized by villous infarction and reduced nutrient transfer. Frequent assessment via non-stress tests or biophysical profiles is required to monitor fetal reserve.

A. Normal protocol: While monitoring is part of the clinical pathway, this rationale does not explain the underlying pathophysiology that necessitates the intervention. Protocols are designed to mitigate specific physiological threats like decreased placental perfusion. A scientific explanation must address the vascular compromise.

B. Increased fetal movement: Hypertensive states often lead to decreased fetal movement as the fetus attempts to conserve energy in a low-oxygen environment. Excessive activity is not a typical characteristic of placental compromise. Reduced movement is a danger sign that requires immediate clinical evaluation.

C. Risk of fetal hypoxia: Compromised placental blood flow limits the amount of oxygen available for fetal hemoglobin saturation. This can lead to intrauterine growth restriction, late decelerations, and fetal distress during labor. Monitoring detects early signs of asphyxiation to prevent permanent neurological injury.

D. Increased amniotic fluid: Preeclampsia and chronic hypertension are more commonly associated with oligohydramnios (low fluid) due to reduced fetal renal perfusion. Excess fluid, or polyhydramnios, is typically linked to gestational diabetes or gastrointestinal obstructions. Fluid levels usually decrease in hypertensive pregnancies.

Hyperemesis gravidarum is a severe complication characterized by intractable vomiting leading to fluid-electrolyte imbalance, ketonuria, and weight loss exceeding 5% of pre-pregnancy mass. The pathophysiology involves high serum hCG levels and potential hyperthyroidism. Patients exhibit signs of intravascular dehydration and metabolic alkalosis.

A. Iron deficiency: While anemia is common in pregnancy, it typically presents with fatigue and pallor rather than acute, persistent emesis and significant weight loss. Iron supplements can actually exacerbate gastric irritation and nausea. It is not the primary cause of the severe hemodynamic instability described here.

B. Hyperemesis gravidarum: The combination of 6-pound weight loss, persistent inability to retain nutrients, and orthostatic dizziness indicates a pathological state beyond normal morning sickness. This condition requires aggressive intravenous rehydration and electrolyte replacement. Dark urine and dizziness are clinical hallmarks of severe volume depletion.

C. Gastroenteritis: An acute infection of the digestive tract usually presents with diarrhea, fever, and abdominal cramping alongside vomiting. While it causes temporary dehydration, the 10-week gestational timing and lack of lower gastrointestinal symptoms point toward a pregnancy-induced etiology. It is typically a self-limiting viral or bacterial event.

D. Normal morning sickness: Physiological nausea of pregnancy usually peaks in the morning and does not result in significant weight loss or clinical dehydration. Clients can typically maintain some oral intake and do not experience dizziness upon standing. It lacks the severe metabolic consequences seen in hyperemesis.