I am 38 weeks pregnant and have recently started hearing little popping sounds coming from round my pelvis area. It doesn't hurt and seems to happen when the baby moves. At first I thought it was my waters breaking, but it's not. My midwife has never heard of this and does not know what it is. It may be my bones shifting, getting ready for birth. Has anyone else experienced this or know what it is?? Any ideas gratefully received!