Over the span of your lifetime that is a heavy toxic load and a lot of stressors on the body. (jessiskitchen.com)
Even the healthiest of moms experience many changes and stressors on their bodies which can cause pregnancy related illnesses. (babygaga.com)
Deficiencies of B12, B6, folic acid and / or iron can all create a shift in fuel availability (specifically in glycolysis: the oxidation or burning of sugar / glucose) which is a huge stressor on the body as it decreases oxygen availability to every cell. (betterbydrbrooke.com)