Further complications or death may occur on a delayed basis.

This decreases the chance of complications occurring in both eyes at the same time.

Research suggests that complications in both forms of the disease occur for similar reasons.

Most complications occurred with the first few procedures when the technique was being developed.

Complications can occur at any time during and after a multiple pregnancy.

Such complications occur almost exclusively during pregnancy or within the child's first year.

So when such a complication occurs, is it an error?

Serious complications and death can also occur but are rarer.

Minor surgical complications occur less than 10% of the time.

Complications may occur particularly in the elderly and those with underlying health problems.