<unk>  is an obstetric procedure wherein the fetus is turned within the womb such that one or both feet present through the cervix during childbirth. It is used most often in cases where the fetus lies transversely or in another abnormal position in the womb. In modern medicine, abnormal lies are increasingly delivered via Caesarean section, though<unk>  is still an option.<unk>  has a long history spanning back to Hippocrates. It fell out of favor over the centuries until revived by Ambroise Paré in the 16th century.
Podalic version
Rhythm method
Theoretical plate
Continuous wave
Octane rating
Prevention template
Simulated presence therapy
Parts-per notation