How does the body achieve a constant temperature?
To achieve this, the human body keeps a careful balance between heat production and heat loss. Heat production is easy - most of the energy we take in with our food is transformed into heat by our muscles and internal organs. When we get too cold, our muscles start to shiver, thus producing more heat, and our capillaries contract, keeping the heat inside.
Temperature is usually controlled by the part of the brain called the hypothalamus. The hypothalamus is like a thermostat for the body. It maintains normal temperature through heating mechanisms, such as shivering and metabolism, and cooling mechanisms, such as sweating and dilating (opening) blood vessels close to the skin, Normal body temperature can vary depending on the individual, the time of day, and even the weather. For most people, a temperature of 98.6 F (37 C) is baseline .
One of the pregnancy symptoms that takes a while to gauge is higher than usual body temperature. You may have been feeling a little bit warm lately and wondered if you are coming down with a cold or something. Take your temperature and see if it is higher than it normally would be.
Your doctor may already have suggested that you keep a record of your body temperature every day. If your temperature is higher than usual and it stays high for two weeks in a row, something is obviously going on with your body