Pregnancy: Diagnostic Tests. The list of diagnostic tests mentioned in various sources as used in the diagnosis of Pregnancy includes: Urine human chorionic gonadotropin (HCG) tests - these are the basis of home pregnancy tests.
Eagles (and most large birds) fly by soaring; it's much more energy efficient than flapping their wings. We do use the technique for our own flights. The reason eagles and other soaring birds do this rather than flap is that they generally hunt from the air and so spend a lot of time waiting for prey. They don't need to go anywhere specific and don't need to move fast until they spot prey. Until then they want to use as little energy as possible.
Once the fish is detected, the eagle flies over with the legs held forwards and the talons ready to grasp the victim. Then, it swoops down onto the fish when it is close to the surface. Only feet and legs are immersed. Once the fish is caught, the eagle rises in the air with its prey in the talons.