im 22wks pregnant with lowlying placenta...1.3cms away from internal os. im absolutely asymptomatic i.e., free from bleeding per vagina & abdominal pain.. im on progesterone 100mg since last 16days...can anyone tel me what is the role of progesterone in lowlying placenta?? beco'z progesterone has risk of break through bleeding & lowlyig placenta also had complication of bleeding per vagina... so kindly help me