Yes. A lot of maternity insurance plans provide the option of reducing the waiting period. They provide riders, such as PED waiting period reduction, to reduce the waiting period applicable under a health insurance policy with maternity cover. However, these riders are available only on the payment of an additional premium amount and may or may not be available with a maternity plan.
For example, suppose the pre-existing diseases waiting period under a maternity insurance plan is 4 years. If you buy a PED waiting period reduction rider, the waiting period can reduce from 4 years to just 2 years.