If you feel weak at times during your fourth month of pregnancy, you should consider the possibility of anaemia. During pregnancy, women sometimes experience anaemia, which can lead to general weakness or dizziness. As anaemia can affect the normal growth and development of the baby, it is best to visit the obstetrics and gynaecology department of the hospital to have blood drawn for routine blood tests. In case of anaemia, avoid spicy and irritating things in your diet, eat less cold food, eat more fresh fruits and vegetables, eat more food containing vitamin B and protein, take care of your rest and avoid overexertion. In cases of significant anaemia, pregnant women may need to be treated with iron supplements.