i am 35 years pregnant woman,22 weeks+4d, i had history of premature contractions& labour twice.I am on proluton depot since 3 weeks.My last weigh since 14/6/2011 was 63.5 Kg, i had great increase in weigh, now 68 Kg with normal Bl.P&urine analysis.My dietary habits are the same, i practice exercise daily.Why this sudden increase, how i can deal?