Final answer:
The gold standard for diagnosing early and late pregnancy failure is through ultrasound imaging, complemented by hormone testing and blood tests.
Step-by-step explanation:
The gold standard for diagnosing early and late pregnancy failure is through ultrasound imaging. Ultrasound is a non-invasive procedure that uses sound waves to produce images of the fetus and the reproductive organs. By examining the uterus and the embryo/fetus, ultrasound can identify any abnormalities or signs of pregnancy failure.
Other diagnostic methods that can be used to complement ultrasound include hormone testing and blood tests. Hormone testing looks for the presence of specific hormones, such as human chorionic gonadotropin (hCG), which is produced during pregnancy. Additionally, blood tests can detect levels of certain chemicals in the blood that may indicate pregnancy failure.
It's important to note that the specific diagnostic approach may vary depending on the individual case and the discretion of the healthcare provider.