Obstetrics specifically deals with the welfare of the pregnant woman and her baby. During pregnancy a number of complications can arise such as ectopic pregnancy, which is a condition where the embryo is in a fallopian tube, fetal distress caused by compression, problems with the placenta or high blood pressure which can be a forerunner of a serious illness called pre-eclampsia. The obstetrician is trained in these and many other complications of childbirth and ensures both mother and baby are safely guided through all of the phases of pregnancy and childbirth. Whether the baby is delivered vaginally or through a planned or emergency caesarian section an obstetrician is trained to handle any change that is presented during the natural, but sometimes complex process of childbirth.