The dead fetus will start to decompose like everything else that is dead and if not removed you will get a serious infection, blood poisoning and become sterile and can even die.
Immune system in a fetus is not well developed. And as such it is less likely and very less harmful for the mother to have damage from antibody from the fetus. Never the less this is possible.
The mother's immune system.
The fetus is isolated from the woman's system by the umbilical cord. It is the only link between the two bodies and has a rather unique filtering and buffering system. There is a condition where rejection can actually take place this happened with my son have forgotten the name of the condition. In any case he got out alive,
During pregnancy, the mother's immune system undergoes changes to tolerate the fetus, which is genetically different. Key factors include hormonal changes, immune cell regulation, and the placenta's role in immune tolerance. These factors help prevent rejection of the fetus while protecting against infections. Imbalances in immune regulation can lead to complications like preterm birth or preeclampsia, affecting both the mother and fetus.
A fetus will start producing IgM antibodies about 20 weeks into the pregnancy. The only antibody the fetus receives from it's mother is IgG which the baby will not start producing on its own until a few months after birth.
Fetus is not a transplant in the body of the mother. Food you ingest does not go inside the body. It remains out side the body. like wise the fetus is not inside the body. It is outside the body of the mother. The proteins from the fetus do not come in direct contact of the mother. There is placental barrier between the fetus and the mother.
Pregnancy
When Rh negative mother carries Rh positive fetus, mother's immune system will not react because most of the time , during the first pregnancy ,fetomaternal blood will not mix. This will happen at the time of parturition and when mother's immune system detects Rh + , it starts producing antibodies and for this it takes at least 3 week and this will have memory. So in her second pregnancy if in case fetomaternal blood are encountered, mothers immune system start destroying the blood cells of the fetus. This case is known as ErythroBlastosis Foetalis or Hemolytic Disease in new born (HDN)
As of yet, the purpose of the appendix in the human body is not known. It is simply there and is often removed. Anyhow, appendix do play role in fetal development and adult.In fetus appendix act as a endocrine organ and in adult they help our body immune system to combat against microbes as it 'train' our immune system by exposing antigens to lymphoid cells in order to produce antibody.
no when Rh negative blood from the fetus interacts with Rh+ blood of the mother there will be no antibodies produced due to absence of antigen on the Rh- blood cells and when Rh positive is mixed with Rh negative blood of fetus no response is produced due to the fact that the fetus has an underdeveloped immune system
No. It can cause damage to the fetus but not abort.
The set of red blood cell surface antigens responsible for serious interactions between a mother and her developing fetus is the Rh factor, specifically the RhD antigen. If a woman who is Rh-negative is carrying a fetus who is Rh-positive, it can lead to hemolytic disease of the newborn, a condition where the mother's immune system attacks the baby's red blood cells. This condition can be prevented with Rh immunoglobulin injections during pregnancy.