An embryo needs to ‘stick’ to the inner lining of the uterus in order for it to implant; and to help it, we can use a special substance called EmbryoGlue®. Of course, it is not quite as simple as it sounds: EmbryoGlue® contains a substance called hyaluronan. This mimics the naturally occurring hyaluronan found in the uterus, and by coating the embryo in it before transfer, it is thought to encourage it to attach to the lining. We use EmbryoGlue® for all our patients.