Rosh Women's Health Practice Exam

In this scenario, the most likely diagnosis of high quantitative serum hCG levels along with an abnormal fundal height at 12 weeks gestation points toward multiple gestation. High levels of hCG are often associated with twin pregnancies or higher-order multiples, as each embryo produces its own hCG. Consequently, when multiple gestations occur, the combined hCG levels can become significantly elevated compared to a singleton pregnancy.

An abnormal fundal height, which is measured to assess the growth of the uterus relative to gestational age, may also be larger than expected if multiple fetuses are present, as the uterus has to accommodate more than one developing child. In this case, both the elevated hCG and the abnormal fundal height are consistent with a multiple gestation scenario.

While hydatidiform mole also causes increased hCG levels, it is typically accompanied by other signs such as severe nausea and vomiting and often a lack of fetal development, which would not be consistent with the presence of detectable fundal height indicative of gestational age. Other options like polyhydramnios can also lead to increased fundal height, but it is less likely at this early stage and is usually associated with additional diagnostic markers. Uterine leiomyoma may cause abdominal growth,