Zar may refer to: 1  Zar, Armenia, a town in the Kotayk Province.  Zar, Azerbaijan, a village in the Kalbajar Rayon currently controlled by the Nagorno-Karabakh Republic.
If you're carrying more than one baby, chances are good you'll deliver early. Twins are usually born around 36 weeks -- four weeks early. Triplets arrive at about 33 weeks, and quads often make their debut at 31 weeks.
Inclusion Criteria: 1  Twin pregnancy (see Exclusion Criterion (a) below re: monochorionic twins) 2  Gestational age 16 0/7 to 25 6/7 weeks at time of enrollment by best-estimated age. 3  Cervical length 0.1 to 15.0 mm on transvaginal ultrasound examination.