To my knowledge there is only one way. Across the placenta and into the foetus. Everything taken into mothers body will pass across the placenta, around the system of the foetus and even returning waste back across the placenta through the magic of Osmosis.
Carbon dioxide and other such waste gases diffuse from the foetus and across the placenta into the mother's blood. Urea (excretory product) also diffuses into the mother's blood. (The substances in bold will answer question).
An unborn baby is referred to as a fetus, or foetus.
The substances can pass through the placental wall.
The fetus receives oxygen and nourishment from the placenta via the umbilical cord. Waste and carbon dioxide return to the placenta via the umbilical cord.
protein helps the foetus to develop by the
The duration of Foetus - film - is 1.7 hours.
Foetus - film - was created on 1994-11-10.
External preasure on abdomen does affect the foetus.
Love - Foetus album - was created on 2005-07-14.
Flow - Foetus album - was created on 2001-05-08.
the aminotic fluid that the foetus gets before its born and when its a foetus