Oxygen, nutrients (such as glucose and amino acids), antibodies, hormones, and waste products (such as carbon dioxide and urea) can be exchanged between the mother and fetus through the placenta. These substances allow for the fetus to receive essential supplies for growth and development while also enabling waste removal.
One of them is vitamins/ food which comes from the mothers food which is needed for the baby to survive.
Oxygen is exchanged from the air in the alveoli into the blood in the capillaries, while carbon dioxide is exchanged from the blood in the capillaries into the air in the alveoli during the process of respiration.
The unborn baby's circulatory system includes the umbilical vessels which connect it to the placenta to exchange substances with the mother's system. When the baby is born these vessels are disconnected.
Oxygen and nutrients, such as glucose and amino acids, pass from the mother through the placenta to the embryo. These substances are vital for the growth and development of the baby during pregnancy.
Capillaries
placenta
placenta
Generally, the younger the mother, the better for both mother and baby
The mother gives the baby food and blood, to help the baby grow!
Gift are exchanged on Christmas because the Three Wise Men gave gifts of frankincense, myrrh and gold to the baby Jesus on Christmas day when he was born.
Water, because it is essential to all living cells.