Narendran et al 2005 randomly placed pregnant mothers into control groups of standard pre-natal care with 2 30min walking sessions/week and the experimental group of pre-natal care plus yoga for 2 30min sessions/week.

At the time of delivery, the yoga group had a higher birth weight (P <.01), lower chances of pre-term labor (p < .0006), lower chances of isolated intrauterine growth retardation (p < .003) and lower pregnancy induced hypertension (p< .025).

Yoga out-performed walking across all measures taken during the study. While it’s still too early to prescribe yoga for all pregnant women, those with a background in yoga should definitely consider continuing the practice while pregnant.