| Potter's version | An obsolete term for a version in which both feet are brought down until the buttocks are delivered, the back is then rotated to an anterior position, the arms and shoulders are delivered by twisting and downward movements. (05 Mar 2000) |
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| spontaneous version | Turning of the foetus effected by the unaided contraction of the uterine muscle. (05 Mar 2000) |
| internal cephalic version | Version performed by means of one hand within the vagina. See: cephalic version. (05 Mar 2000) |
| external cephalic version | Version performed entirely by external manipulation. See: cephalic version. (05 Mar 2000) |