Ringwomb is when the cervix fails to dilate sufficiently to allow delivery of the lamb(s). While sometimes the cervix of affected ewes can be opened with gentle pressure or the injection of hormones, usually such efforts prove futile and a caesarian section to remove the lambs is the only option that will produce a successful outcome. Unfortunately, little is known about the cause of ringworm and how to prevent it. There is some evidence to suggest that ringwomb has a genetic link.