Vag Inserted deep into the vagina.
Supplementation of luteal phase during ART cycles 600 mg daily in 3 divided doses from the day of embryo transfer until at least 7th wk of pregnancy & not later than 12th wk of pregnancy.
Threatened miscarriage or prevention of habitual miscarriage due to luteal phase insufficiency 200-400 mg daily in 2 divided doses up until 12th wk of pregnancy.
Preterm labour Women w/ history of preterm labour 100 mg daily until 36th
wk of pregnancy,
cervix shorter than 15 mm detected at 22-26 wk 200 mg daily until 36th wk of pregnancy.