Atosiban Altan is indicated to delay imminent pre-term birth in pregnant women with: - regular uterine contractions of at least 30 seconds duration at a rate of 4 or more per 30 minutes- a cervical dilation of 1 to 3 cm (0-3 for nulliparas) and effacement of 50 % or more - age: 18 years and above - a gestational age from 24 until 33 completed weeks - a normal foetal heart rate