How far should we go to save extremely premature babies? "Hardest decision you’ll ever make in your life" – Hollie Reynolds Doctors call it the grey zone – the period of time when babies born prematurely are right on the cusp of viability. Babies born between 23 weeks and 25 weeks and six days are often not breathing when they're born. Decisions need to be made whether or not to resuscitate, and also whether to continue life support while they develop outside of the womb. The chances of survival or survival without disability can change rapidly, day-to-day, hour-to- hour. Insight hears from parents, doctors, nurses and ethicists about how these life and death decisions have to be made in the face of great uncertainty and in some cases, a matter of minutes.