A woman in Northern Ireland has given birth to six babies - four girls and two boys - in a caesarian section delivery involving 30 medical staff, dpa quoted the Royal Jubilee Maternity Hospital in Belfast as saying today. The mother conceived the babies naturally and not had undergone fertility treatment. The babies weighed between 500 grams and 1 kilo, the hospital said. The family had requested privacy and would not be available for photographs. The birth of sextuplets is rare across the world, occurring in about one out of 4.5 million pregnancies. Previously, the largest multiple birth in Northern Ireland was quintuplets, born in 2002.