<s>[INST] My daughter is 21 weeks pregnant. Here titre score went from 2 to 16 in 2 weeks. They say there is nothing they can do but monitor the babys blood flow to the brain, etc. Something about not being the normal Rh factor, but a rare form on the 4th instead of 3rd level of something. The baby is now 15 ounces and she has been having contractions for 2 weeks. They are not as concerned about the contractions as the titre level. What are the chances of her delivering a viable baby and how far along does she have to be for the baby to have a fair chance of making it? [/INST] Hi dear, I have gone through your question and understand your concerns. Rh titles, if raised, cause hemolytic disease in the fetus causing fetal anemia, leading to heart failure in the fetus and intrauterine death of the fetus. It is monitored by Doppler ultrasound of the middle cerebral artery of the brain of the fetus. Premature contractions at 21 weeks of pregnancy can lead to extremely preterm delivery and can cause many problems in the fetus. Viability is a bit compromised in extremely preterm baby. Hope you found the answer helpful. Wishing you good health. Chat Doctor.  </s>