title: [Analysis of pregnancy outcomes after in vitro fertilization-embryo transfer and intracytoplasmic sperm injection].
abstract: OBJECTIVE
  To compare pregnancy and perinatal outcomes between in vitro fertilization-embryo transfer (IVF-ET) and intracytoplasmic sperm injection (ICSI).
  
  
  METHODS
  A retrospective study was carried out to measure pre-clinical and clinical abortion, ectopic pregnancies, multiple gestations, birth weight, gestational age, congenital malformation and perinatal mortality in patients receiving either IVF-ET (n = 143, group 1) or ICSI (n = 173, group 2) from January 1999 to June 2001. The outcomes of singleton and twin were compared separately.
  
  
  RESULTS
  The maternal age, infertility duration, parity and the number of transferred embryo were comparable between the two groups. There were no significant differences in abortion rate (16.1% vs 13.3%), birth rate (65.7% vs 74.6%) between IVF-ET and ICSI groups (P > 0.05). In singleton, the rates of low birth weight, small for gestational age and pre-term birth were 1.8%, 7.3%, 5.5% respectively in IVF-ET group and 6.8%, 8.1%, 14.9% respectively in ICSI group. In twin, the rates of low birth weight, small for gestational age and pre-term birth were 34.2%, 30.3%, 42.1% respectively in IVF-ET group and 42.6%, 38.0%, 46.3% respectively in ICSI group. There were no significant differences between the two groups (P > 0.05). But the rates of low birth weight, small for gestational age and pre-term birth were higher in twin than in singleton (P < 0.01). The incidence of congenital malformation was 2.2% and 1.6% in IVF-ET and ICSI group respectively (P > 0.05).
  
  
  CONCLUSIONS
  The pregnancy and perinatal outcomes are similar between IVF-ET and ICSI groups. Twin is the main cause of low birth weight, small for gestational age and pre-term birth.
authors.affiliation: Department of Reproductive Medicine Center, First Affiliated Hospital, Wenzhou Medical College, Wenzhou, Zhejiang Province 325000, China.
authors.forename: Wen-qin
authors.initials: WQ
authors.lastname: Lin
authors.forename: Jin-ju
authors.initials: JJ
authors.lastname: Lin
authors.forename: Bi-Lü
authors.initials: BL
authors.lastname: Ye
authors.forename: Yun-qin
authors.initials: YQ
authors.lastname: Chen
authors.forename: Jun-zhao
authors.initials: JZ
authors.lastname: Zhao
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.forename: Hai-hong
authors.initials: HH
authors.lastname: Chi
mesh_terms: D000328:Adult; D001724:Birth Weight; D000013:Congenital Abnormalities; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D011247:Pregnancy; D011256:Pregnancy Outcome; D012189:Retrospective Studies; D020554:Sperm Injections, Intracytoplasmic / Q000379:methods; D016896:Treatment Outcome