To address the question regarding if and how much green space as an independent factor
contributes to blood pressure differences during first trimester of pregnancy, we used data from the
well-characterised study of pregnant women of the city of Kaunas. Women during the first trimester of
pregnancy are a suitable group for the study of hypertensive disorders, since even though changes in
pregnancy lead to an increased stress on the cardiovascular system, such effects mainly occur from the
second trimester of pregnancy on [29]. Therefore, blood pressure during the first trimester of
pregnancy is mainly associated with external factors.