References
- Macgillivray I., Campbell D M, Thompson B. Twinning and Twins. 1st ed. John Wiley & Sons Ltd., New York 1988
- Tuppin P, Blondel B, Kaminski M. Trends in multiple deliveries and infertility treatments in France. Br J Obstet Gynaecol 1993; 100: 383–5
- Derom C, Derom R, Vlietinck R, Maes H, Van Den Berghe H. Iatrogenic multiple pregnancies in East Flanders, Belgium. Fertil Steril 1993; 60: 493–6
- Lindberg B, Kjellmer I, Wennerger W, RydhstrÖM H. Fler-börd, ett ökande obstetriskt och pediatrikt problem. Läkar-tidn 1994; 91: 806–11
- Wennergren U B, Janson P O, Wennergren M, Kjellmer I. Pregnancy complication and short term follow up of infants born after in vitro fertilization and embryo transfer. Acta Obstet Gynecol Scand 1991; 70: 565–73
- McFaul P B., Patel N, Mills J. An audit of the obstetric outcome of 148 consecutive pregnancies from assisted conception: implications for neonatal services. Br J Obstet Gynaecol 1993; 100: 820–5
- Doyle P., Beral V., Moconochie N. Preterm delivery, low birthweight and small-for gestational-age in liveborn singleton babies resulting from in-vitro fertilization. Hum Reprod 1992; 7: 425–8
- Georgsdottir I, Geirsson R T, Johannsson J H, Biering G, Snaedal G. Classification of perinatal and late neonatal deaths in Iceland. Acta Obstet Gynecol Scand 1989; 68: 101–8
- Hogston P, James D K. Total perinatal wastage. A clarification of priorities. Br J Obstet Gynaecol 1990; 97: 999–1002
- Whitfield C R, Smith N C, Cockburn F, Gibson A AM. Peri-natally related wastage-a proposed classification of primary obstetric factors. Br J Obstet Gynaecol 1986; 93: 694–703
- ÁGÚStsson Th, Geirsson R T. Athugun á tvíburafaedingum eftir edlilegan getnad og glasafrjóvgun. (Obstetric outcome among naturally and IVF conceived twins)(Icelandic, Engl-ish abstract). Laeknabladid, Icelandic Med J 1995; 81: 242–7
- Gissler M, Silverio M M, Hemminki E. In-vitro fertilization pregnancies and perinatal health in Finland 1991–1993. Hum Reprod 1995; 10: 1852–6
- Peterson K, Hornnes P J, Ellingsen S, Jensen F, Brocks V., Stamp J, et al. Perinatal outcome after in vitro fertilisation. Acta Obstet Gynecol Scand 1995; 74: 129–31