That is, less than one in 1,000 pregnancies for mothers less than 30 years of age results in a baby with Down syndrome. For mothers who are 44 years of age, about 1 in 35 pregnancies results in a baby with Down syndrome.
DEFINITION of 'Defined-Benefit Plan'. An employer-sponsored retirement plan where employee benefits are sorted out based on a formula using factors such as salary history and duration of employment.
Defined Benefit Plans define the benefit ahead of time. That benefit is usually a monthly payment in retirement, based on the tenure of the employee, his or her salary, and possibly other factors. Payments are usually defined to be for the lifetime of the employee.