Has high-quality research been published since 2014 on diagnosing ectopic pregnancy and managing pregnancy of unknown location, including the use of serum hCG, progesterone measurements, and TVS for predicting pregnancy viability for guidelines?

High-quality guidelines recommend using TVS and serum hCG/progesterone measurements as primary diagnostic tools for ectopic pregnancy and pregnancies of unknown location, highlighting their integral role in assessing pregnancy viability in early presentations.