Studie zu Assisted Hatching
Verfasst: 03 Sep 2004 22:38
Das habe ich von woanders kopiert. Wer mag übersetzen?
Assisted Hatching
One key component of a successful attempt at in vitro fertilization is implantation of the embryo in the uterus. Although the exact steps in implantation are poorly understood, one critical component is thought to be the normal rupture of the surrounding zona pellucida with escape of the developing embryo, termed Hatching. It is hypothesized that during the in vitro component of the IVF, the zona pellucida becomes hardened, thus impairing the Hatching process. Alternatively, some embryos may have some inherent inability to induce thinning of the zona pellucida before Hatching. In either case, mechanical disruption of the zona pellucida has been proposed as a mechanism to improve implantation rates. Schoolcraft and colleagues reported that in patients over the age of 40 or who have failed prior attempts at implantation or when embryos had a thick zona pellucida, assisted Hatching was associated with a clinical pregnancy rate per transferred embryo of 33% compared to 6.5% in a control group. (7) There is no evidence that assisted Hatching should be routinely performed as part of IVF procedures. (8,9) Edi-Osagie and colleagues conducted a systematic review of randomized controlled trials involving assisted Hatching and concluded that although assisted Hatching probably enhances clinical pregnancy, it had no effect on the live birth rate. (10)
( http://www.regence.com/trgmedpol/medicine/med52.html )
( http://www.ncbi.nlm.nih.gov/entrez/quer ... t=Abstract )
Am ineressantesten sind wohl die Ergebnisse von Edi-Osagie, er kam zu der Schlussfolgerung das AH zwar zu einer erhoehten SS-Rate fuehrt aber keinen Einfluss auf die Anzahl der Lebendgeburten hat.
Es steigt also die Wahrscheinlichkeit einer FG.
Assisted Hatching
One key component of a successful attempt at in vitro fertilization is implantation of the embryo in the uterus. Although the exact steps in implantation are poorly understood, one critical component is thought to be the normal rupture of the surrounding zona pellucida with escape of the developing embryo, termed Hatching. It is hypothesized that during the in vitro component of the IVF, the zona pellucida becomes hardened, thus impairing the Hatching process. Alternatively, some embryos may have some inherent inability to induce thinning of the zona pellucida before Hatching. In either case, mechanical disruption of the zona pellucida has been proposed as a mechanism to improve implantation rates. Schoolcraft and colleagues reported that in patients over the age of 40 or who have failed prior attempts at implantation or when embryos had a thick zona pellucida, assisted Hatching was associated with a clinical pregnancy rate per transferred embryo of 33% compared to 6.5% in a control group. (7) There is no evidence that assisted Hatching should be routinely performed as part of IVF procedures. (8,9) Edi-Osagie and colleagues conducted a systematic review of randomized controlled trials involving assisted Hatching and concluded that although assisted Hatching probably enhances clinical pregnancy, it had no effect on the live birth rate. (10)
( http://www.regence.com/trgmedpol/medicine/med52.html )
( http://www.ncbi.nlm.nih.gov/entrez/quer ... t=Abstract )
Am ineressantesten sind wohl die Ergebnisse von Edi-Osagie, er kam zu der Schlussfolgerung das AH zwar zu einer erhoehten SS-Rate fuehrt aber keinen Einfluss auf die Anzahl der Lebendgeburten hat.
Es steigt also die Wahrscheinlichkeit einer FG.