Like any Yoga, Mudras must be practiced sincerely and after gaining full knowledge of them. With few exceptions, a practice of these, with partial knowledge can, at the least, result in no gains and if practiced wrongly also produce undesireable effects.
Apan Mudra:Helps in purification of the body, urinary problems, easy secretion of excreta, regulating menstruation and painless discharge, easy child delivery, Piles, Diabetes and kidney disorders.
Caution: This Mudra should not be done by pregnant ladies before completing 8 months. After that a 10 minutes practice 3 to 4 times a day will ensure normal delivery.