Owing to variations between animals and humans in the genetic expressions of the next generation, these doubts cannot be resolved through animal tests.

The risks of high blood pressure and diabetes increase with age during the gestation period.

Such babies may be exposed to more health risks in later life.

Test-tube technology gives them another chance to have a baby. But we are not encouraging women to put off their conception for too long.

However, it is still not a responsible thing to do to establish an egg bank for the general public at present. More research is required.