Shunt.: Pregnancy is a physiologic shunt of blood through the placenta to the growing fetus. This requires the heart to pump additional blood per mnute, the thyroid gland to work overtime and the lungs to expel extra co2. The combination of the above changes, along with nausea, insomnia, mood swings and depressed immunity from hormonal effects all contribute to a feeling of fatigue that persists to term.
Answered 9/20/2019
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