Hi,
Some lenders do allow “payment holidays” or a period where you can pay a reduced mortgage payment. However, I do not think that AIB allows this. In any event, in the long run this would not save you any money.
However, I think your suggestion to use part of your savings to pay down part of the capital is the better and more cost effective option.
This sum can be used to reduce either the term of your mortgage or your monthly repayment.
Effectively, what this means is that you would save the interest, which would have been payable on that €30,000 over the remaining term of the mortgage.
This is more valuable to you than the interest you would have earned on that amount less DIRT.
When you get on your feet after the baby, you can save the difference between your original mortgage repayment and the reduced payment.
Before committing to anything you should, of course, talk to your bank.