Tocolytics

Which tocolytic do you prefer after cervical Encerclage routinely to prevent PTL to choose any one agent .

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 A) Duphaston 10 TID B) Nicardia Retard 20 mg  1 BD  C) Vaginal Progesterone Tab( suppository) 100 mg or 200 mg OD or higher dose i.e. on BD schedule 200+200 mg D)  Oral micronized progesterone 300 mg  1 tab pre lunch . E) Inj 17 OH progesterone 500 mg deep IM   F) short term tocolysis  Isoxsuprine HCL Tocolytics only for few days :G) Probiotics