The mother's blood does not normally mix with the baby's blood during the pregnancy unless there has been a procedure (such as amniocentesis or chorionic villus sampling) or vaginal bleeding. These antibodies will then bind with the baby's Rh-positive red blood cells, causing them to be destroyed.
The fetus is connected to the placenta and umbilical cord inside of the mother’s uterus. when the mother consumes harmful substances, they can reach the fetus’s own bloodstream after it travels through the umbilical cord.
I think the best choice would be to think about the good feelings he has. The more he think about being stressed and sad, the more those feelings would increase and take up his whole emotions. Thinking of good feelings would surely help him lighten up the load he is feeling.
