Perinatal outcome analysis of twin pregnancies at the Department of Obstetrics and Gynecology Central Clinical Hospital of Ministry of Interior and Administration in Warsaw in the years 2005-2006. 
A group of 59 twin pregnant women who gave birth at the Department of Obstetrics and Gynecology Central Clinical Hospital of Ministry of Interior and Administration in Warsaw in the years 2005-2006.  The patients have been divided into four groups: spontaneous twin pregnant women (n=16), twin pregnant women after in- vitro fertilization (IVF) (n=11), twin pregnant women after in-vitro fertilization with intracytoplasmic sperm injection (ICSI) (n=29) and twin pregnant women after ICSI and transfer of frozen embryos (n=3).  In one case intrauterine death of one of twins in the 34th week of gestation has been noticed.  The cause of the death was umbilical cord wrapped around his neck.  The gestation was ended with cesarean section and Apgar score of the second twin was 8 in the fifth minute.  In one case there was an urgent indication for a cesarean delivery of children with a very low birth weight (because of intrauterine infection, preterm labor in progress) and in three cases at least one of twins with a low birth weight.  Among the group 19 women (32%) have given birth prematurely.  The Apgar score in the first, third and fifth minute has been statistically significant and inversely proportional dependent only on the gestational age.  There were no differences in birth weight among study groups regardless the way of conception.  Only two spontaneous twin pregnant patients have had a vaginal labor.  By the remaining 57 patients there has been an elective cesarean section in thirty five cases and there has been an urgent indication for cesarean section in twenty two cases.