A micro-oscillation element includes a movable main section, a first frame and a second frame, and a first connecting section that connects the movable main section and the first frame and defines a first axis of rotation for a first rotational operation of the movable main section with respect to the first frame. The high-side circuit provides a current to an inductor, which is used for generating an output voltage. Antigens from Group A, andor Group B, and Group C are detected in a fluid from the animal, and pregnancy is reliably determined. The shoulder exoskeleton has its proximal end fixed to the front plate, whereby the front plate provides a fixed reference for all movements of the exoskeleton, and the wrist exoskeleton is fixed to a rigid glove worn on the hand of the operator.