With my DD I continually played and sang Morningtown Ride to her when I was pregnant, and now even at 14 she still feels all calm and safe when she hears it.
With Caidan, I chose a song called The Unicorn, and played it and sang it to my bump all the time.
He hadnt really heard it again until last week, when my DH played it on the PC, and as soon as Caidan heard it, he stopped what he was doing and crawled over to me, put his arms up and gave me the biggest kiss and cuddle you could imagine and cuddled in to me for the whole song. My DH and DD couldn't believe his reaction, and it brought a tear to my eye!!!
I say do it again this time round.
xxx