Pregnancy, especially for first-time mothers, can be a stressful time because of additional pressure on the body and the amount of change mothers must adjust to. Although occasional feelings of stress are completely normal, some reports have shown expectant mothers with chronic stress inducing detrimental effects on their developing fetus. As mentioned in earlier sections, stress triggers the sympathetic nervous system to release cortisol and other stress hormones as a part of the fight-or-flight response that is primarily designed to go off when the body is presented with danger.