new report says that women who do not have children may die earlier than those who do. Researchers from Aarhus University in Denmark looked at over 21,000 couples between 1994 and 2005. They all tried to have children, without success. women all went to special clinics for IVF treatment – technique where doctors fertilize woman’s egg in laboratory. The researchers said that women who could not have children were four times likelier than mothers to die early. Some doctors have said report might cause childless women to worry about dying early. truth is there is very small risk of early death. Just 316 women died during 11-year study. Very few of those died earlier than average. One critic of report said study was very misleading. Dr Ingrid Collins, psychologist, told BBC: "This is very specific situation of people who are trying to have children. study's findings cannot be used to [talk about] whole general population." She added: "People having IVF tend to be desperate for child. If they are unsuccessful, they may be depressed. It may be this [depression] rather than childlessness that [causes earlier death]." Another psychologist, Dr Helen Nightingale, agreed, saying: "Being childless without doubt reduces your fight for life…. support of family, focus on your children and grandchildren, and desire to watch how they turn out drives your [will] to survive."