Skeletal muscles atrophy and weaken with old age. The number of motor-units decreases and the number of denervated fibres increases with age. Denervated fibres lack contractile activity, atrophy, and contribute to whole muscle atrophy and weakness. Electrical stimulation of denervated muscles suppresses the atrophy and weakness. We electrically stimulated EDL muscles of adult and old rats durin...

this one year retrospective study was conducted in mirza kuchak khan maternity hospital, tehran, 1989-1990, to compare complications of pregnancy in adolescent (below 20 years old ) and young adult (20-24 years old) mothers. the results were as follows: 14.4% of all the deliveries during the period of study were adolescent mothers. the proportions of the following complications were higher in t...