Parasitaemia and Hb will be assessed at inclusion, at week 28 and at delivery. During monthly antenatal care visits women will be asked about illnesses that have occurred since their last visit and about any treatment taken. Routine ANC examinations will be undertaken. Malaria attacks will be recorded and women will be advised to come for treatment at the health units in case of any illness. Records will be kept by health care workers (laboratory staff, midwives, counsellors), TBAs and the PI. The District Director of Health Services (DDHS) will be an independent monitor for the research project.