An embryo transfer catheter with a protective sheath is disclosed. The use of a protective sheath shields a guide catheter from cervical mucus. The retracted open flaps of the outer protective sheath draw the mucus and blood away from the inner guide catheter. This allows an inner embryo transfer sheath...http://www.google.es/patents/US7637904?utm_source=gb-gplus-sharePatente US7637904 - Catheter with snap on feature
