Final answer:
The two most common complications of hyperemesis gravidarum include severe dehydration due to excessive vomiting, and electrolyte imbalances, especially low potassium levels, which can cause muscle weakness and heart issues.
Step-by-step explanation:
The two most common complications of hyperemesis gravidarum are severe dehydration and electrolyte imbalances. Severe dehydration can occur due to excessive vomiting, leading to symptoms such as dizziness, fainting, and low blood pressure (hypotension). Electrolyte imbalances, particularly low levels of potassium (hypokalemia), can lead to muscle weakness, cramps, and in severe cases, irregular heartbeats. Additionally, prolonged vomiting can result in vitamin and nutrient deficiencies, causing further complications such as vitamin B1 (thiamine) deficiency, which can lead to neurologic symptoms.