O26.8 - Other specified pregnancy related conditions
O26.81 - Pregnancy related exhaustion and fatigue
O26.811 - Pregnancy related exhaustion and fatigue, first trimester
O26.812 - Pregnancy related exhaustion and fatigue, second trimester
O26.813 - Pregnancy related exhaustion and fatigue, third trimester
O26.819 - Pregnancy related exhaustion and fatigue, unspecified trimester