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.
The risk of preterm labor and premature birth are heightened when there is more than one baby in the womb. Other conditions such as preeclampsia, placental dysfunction, and TTTS are more prevalent in twin pregnancy and increase the risk of an early delivery. Research from the National Organization of Mothers of Twins Clubs (NOMOTC) indicates that about half of multiples are born before 36 weeks gestation. An informal, unscientific poll on my site indicates 18% delivered before 28 weeks and only 15% after 38 weeks.