What do unborn fetuses eat when in the womb? The fetus needs sufficient nutrients to grow and develop in the mother\’s body, and these nutrients mainly come from the mother\’s blood. The food eaten by the mother enters the blood after digestion and absorption. The nutrients are present in the blood and supplied to the baby through the placenta and umbilical cord! During the entire pregnancy, the mother delivers the nutrients and oxygen needed by the fetus to the fetus through the placenta and umbilical cord. The fetus and mother are mainly connected through the placenta and umbilical cord. Nutrients present in the mother\’s blood are also transported to the fetus through the blood vessels in the placenta and umbilical cord. The placenta plays a great role in the fetal blood circulation. It is the \”nutritional exchange station\” between the mother and the fetus, supplying all the nutritional needs of the fetus. Moreover, the metabolites excreted from the fetal body must also be transmitted to the placenta through the umbilical cord, and then pass through the placenta and be excreted into the mother\’s body.