If you sugar levels are too high, your doctor will then do a longer test called a glucose tolerance test, in which you consume the sugary drink once again and have your blood tested every hour for three hours to determine whether you have gestational diabetes.
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Introduction to the Types of Valves Because of the diversity of the types of systems, fluids, and environments in which valves must operate, a vast array of valve types have been developed. Examples of the common types are the globe valve, gate valve, ball valve, plug valve, butterfly valve, diaphragm valve, check valve, pinch valve, and safety valve. Each type of valve has been designed to meet specific needs. Some valves are capable of throttling flow, other valve types can only stop flow, others work