Marriage has long been thought to be beneficial - both in sickness and in health.
But a study suggests that widows actually suffer less stress and frailty than wives whose husbands are still alive. The findings are in contrast to previous research which showed marriage has a protective effect on health, lowering the risk of heart attack and depression, and increasing the chance of surviving from cancer.
The study, by the University of Padova, in Italy, found that while men suffer negative consequences when their wives die - because they rely more heavily on their spouses - women appear to get healthier.
Dr Caterina Trevisan, lead researcher on the study, said the presence of a wife may bring benefits for men in terms of household management and healthcare, whereas women are "more likely to feel stressed and find their role restrictive and frustrating".
She said: "Since women generally have a longer lifespan than men, married women may also suffer from the effects of care-giver burden, since they often devote themselves to caring for their husband in later life."