Determining the prognosis for survival of baby pregnancy with threatened preterm labor between 22 and 25 completed weeks of gestation remains problematic. The children born at the threshold of viability set a variety of complex medical, social and ethical decisions. They can be formolirani as follows: How small is small enough, or how to determine the limit of viability? What are the risks that these children? How to contact the parents of these children? What type of resuscitation is required in this group of children and how?