Int.J.Curr.Microbiol.App.Sci (2014) 3(1): 713-718 713 Original Research Article Haematological profile of pregnant women in Umuahia, Abia State, Nigeria Obeagu Emmanuel Ifeanyi 1* , Obarezi Thompson Ndubuisi 2 , Eze Obioma Benedeth Leticia 3 and Emelike Chinedum Uche 1 1 Diagnostic Laboratory, University Health Services Department, Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria 2 University Health services Department, Michael Okpara University of Agriculture, Umudike, Abia state, Nigeria 3 Department of Biochemistry, University of Nigeria, Nsukka, Nigeria *Corresponding author ABSTRACT Introduction Pregnancy is the fertilization and development of one or more offspring, known as an embryo or fetus, in a woman s uterus. It is the common name for gestation in humans. Childbirth usually occurs about 38 weeks after conception in women who have a menstrual cycle length of four weeks, this is approximately 40 weeks from the start of the last normal menstrual period(LNMP).An embryo is the developing offspring during the first 8 weeks following conception and subsequently the term fetus is used until birth(MedicineNet,2011). In many societies pregnancy is somewhat arbitarily divided into three trimester periods, as a means to simplify reference to the different stages of prenatal development. The first trimester carries the highest risk of miscarriage. During the second trimester, the development of the fetus can be more easily monitored and diagnosed. The beginning of the third often approximates the point of viability or the ISSN: 2319-7706 Volume 3 Number 1 (2014) pp. 713-718 http://www.ijcmas.com Keywords Pregnant women; Haemato- logical profile. Every stage of pregnancy is unpredictable and each pregnancy comes with different presentation but there should be known mean changes in some of the haematological profile and that is why this study was done to help all involved with care of pregnant women to know some of these changes and the proper ways to handle them.80 subjects were chosen for the study.40 subjects were pregnant women and 40 were non-pregnant women with average age of 27.3 years ranging from 19-34 years.The study showed significant changes(P<0.05) in mean values of BC,HCT,MCV,MCH,WBC,Lymphocytes,Monocytes,Eosinophils of the pregnant women relative to non-pregnant women.There were significant changes(P<0.05) between the trimesters in most of the parameters showing carefulness with pregnant women at any stage of the pregnancy.