Elective single embryo transfer in assisted reproduction

BACKGROUND: In Norway, assisted reproduction has been regulated by law since 1987, but the in vitro fertilization (IVF)-clinics are free to decide the number of embryos transferred. During the 1990ies, the number of embryos replaced was reduced from three to two. Triplets almost disappeared, but the twinning rate remained unchanged. According to the latest national data, 27.5 % of the deliveries following IVF and intracytoplasmic sperm injection (ICSI) in 2002 were multiple births. In our hospital, 23.9 % of the deliveries following IVF/ICSI in 2003 were multiple births. To reduce the multiple pregnancy rate, eSET was introduced as a routine in patients with a high probability to become pregnant in November 2004. MATERIAL AND METHODS: The results of eSET from the beginning of November 2004 until July 2005 are presented. All three inclusion criteria for eSET had to be fulfilled: 1) age

Keywords:

• Obstetrics
• Emergency medicine
• Single Embryo Transfer
• Medicine
• Intracytoplasmic sperm injection
• in patient
• Pregnancy rate
• ongoing pregnancy
• In vitro fertilisation
• Cryopreservation
• national data

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