The recent world malaria report indicated that Nigeria accounts for a quarter of all malaria cases in the 45 malaria endemic countries in Africa. That eleven percent of maternal deaths in Nigeria is attributable to malaria clearly shows the enormous challenge of disease to the country. Most cases of malaria in pregnancy are asymptomatic. This project set out to evaluate the prevalence and outcome (using maternal haemoglobin and fetal weight) of asymptomatic malaria in pregnancy using labouring women in a tertiary health institution in South East Nigeria. This work found a prevalence rate of 51.6% for asymptomatic peripheral maternal malaria parasitaemia, 35.7% for maternal placental malaria parasitization and 31.2% for cord blood malaria parasitaemia. Though all the species of plasmodium were involved in asymptomatic maternal malaria, (except in the cord blood where plasmodium ovale and plasmodium malariae were not seen) the highest infestation rates of 86.5%, 86.4% and 93.1% for peripheral maternal blood malaria parasitaemia, placenta parasitization and cord blood parasitaemia respectively were by plasmodium falciparum, which caused the most severe effect. Though asymptomatic peripheral maternal malaria parasitaemia did not cause maternal anaemia generally in this project, parity was found to have an effect as it caused significant anaemia in primigravidas. Maternal peripheral blood malaria parasitized primigravidas had an average haemoglobin concentration of 8.8g/dl in contrast to parasitized multigravidas who had 10.89g/dl. This was not statistically significant. Among the primigravidas, parasitized mothers had an average haemoglobin concentration of 8.8g/dl against 12.18g/dl for non parasitized primigravidas, a difference of 3.38g/dl which was found to be statistically significant at a P-value of 0.034. There was no statistically significant effect in multigravidas. Asymptomatic peripheral maternal blood malaria parasitaemia neither caused significant fetal anaemia nor low birth weight in the babies. Placental malaria parasitization did not cause significant maternal anaemia and had no significant effect on fetal weight or haemoglobin. Cord blood malaria parasitaemia did not also lead to significant reduction in birth weight or cause fetal anaemia. Asymptomatic malaria parasitaemia in pregnancy in this project did have statistically significant adverse consequences on primigravidas where it caused significant maternal anaemia. This finding is very important in this group of mothers considering the known adverse consequencies of anaemia in causing fetal and maternal morbidity and mortality especially in our resource poor practice environment. Every effort must therefore be made by Obstetricians to intensify efforts at preventing asymptomatic malaria parasitaemia in pregnancy especially in primigravidas. This should include efforts at advocacy and the judicious and consistent implementation of the World Health Organisation’s currently recommended three-pronged approach to the control of malaria in pregnancy through the use of insecticide treated nets, intermittent preventive treatment using curative doses of sulphadoxine-pyremethamine and effective case management of clinical infections. Continuous high quality research into the persistent problem of malaria in pregnancy should not be forgotten especially now that media propaganda and foreign donours are more likely to influence our health care and health research priorities