COMMON CAUSES OF WEAKNESS AND FATIGUE. ✅ Hormonal changes: The surge in progesterone, especially in the first trimester, can cause significant tiredness. ✅ Increased bl@@d volume: The body is producing more bl@@d to supply the placenta and baby, which makes the heart work harder and can lead to fatigue. ✅ Lower bl@@d sugar and bl@@d pressure: Pregnancy can cause both bl@@d sugar and bl@@d pressure levels to dip, leading to weakness and dizziness. ✅ Anemia: Iron deficiency anemia is a common caus