The trace elements used in the study are zinc, copper, selenium and iron, these have been implicated in various reproductive events. Maternal trace elements intake and their concentration are important for maternal and fetal well-being;however, data is insufficient in Ghanaian pregnant women. Especially, their concentration according to the pregnancy course (1</span><sup><span style="font-family:Verdana;">st</span></sup><span style="font-family:Verdana;">, 2</span><sup><span style="font-family:Verdana;">nd</span></sup><span style="font-family:Verdana;">, and 3</span><sup><span style="font-family:Verdana;">rd</span></sup><span style="font-family:Verdana;"> trimester) should be determined, which may provide fundamental data of this issue. The maternal blood level</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">s</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> of four trace elements</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">:</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> zinc, copper, selenium and iron, were determined according to the gestational age in Ghanaian pregnant women. Blood samples were taken from 150 pregnant women (50 for each trimester) and 50 non-pregnant women (control)</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">.</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> Concentration of four trace elements w</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">as</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-