Hello. I have bought lots of maternity and baby stuff in the last few weeks. When I looked at my bank statement I was shocked to see how much money I have spent. I am now trying to decide what is really necessary and what I can take back to the shops. I can't make up my mind whether maternity sleeping bras are necessary, even though I have done the search thing. My bust is a normal size and I am not uncomfortable at night. What is the purpose of a maternity sleeping bra, is it to make the wearer more comfortable or is it to prevent sagging afterwards? (The latter would be a good reason for me to wear one). Thanks.