RESUMO
AIM: The aim of this study was to assess the quantitative and qualitative outcomes of assisted reproductive technologies in Italy, from 2005 to 2007, collected by the Italian Assisted Reproductive Technologies Register (IARTR). METHODS: We analyzed, retrospectively, 121,708 ART treatments performed by Italian assisted reproductive technologies (ART) centres from 2005 to 2007. RESULTS: In the study period ART Italian centers were reporting data to the IARTR. Number of total cycles (all homologous) reported was 121,708 including 110,074 fresh (FRESH), 8682 frozen/thawed oocytes (FO) and 2952 frozen embryo (FER). Pregnancy rates per cycle with respect to FRESH, FO and FER treatments were 19.1%, 10.2% and 15%, respectively. Delivery rate per cycle with at least one live birth was 10.8%, 5.8% and 8.4%, respectively, per type of procedure. Twin and "triplet or more" birth rate per delivery was 21% and 2.8%; 12% and 0.4%; 14.9% and 0.8%, respectively. During the study period 15923 ART infants were born (0.95% of all newborn in Italy). CONCLUSION: From 2005 to 2007 we registered a strong increase in ART procedures concomitantly with a qualitative improvement leading to increased pregnancy and live birth rates per cycles. Remarkably, pregnancy loss to follow-up decreased drastically during the three years study-period.
Assuntos
Técnicas de Reprodução Assistida/estatística & dados numéricos , Aborto Terapêutico/estatística & dados numéricos , Adulto , Feminino , Fertilização in vitro/estatística & dados numéricos , Número de Leitos em Hospital , Humanos , Recém-Nascido , Itália , Idade Materna , Trabalho de Parto Prematuro/epidemiologia , Recuperação de Oócitos/estatística & dados numéricos , Síndrome de Hiperestimulação Ovariana/epidemiologia , Gravidez , Resultado da Gravidez , Taxa de Gravidez , Gravidez Ectópica/epidemiologia , Gravidez Ectópica/etiologia , Gravidez Múltipla/estatística & dados numéricos , Sistema de Registros , Técnicas de Reprodução Assistida/legislação & jurisprudência , Estudos Retrospectivos , Injeções de Esperma Intracitoplásmicas/estatística & dados numéricosRESUMO
This paper reports on oocyte cryopreservation efficacy in Italy with respect to successful IVF from 2005 to 2007, presenting data from 193 centres collected by the Italian National Register. Post-thawing survival rates, number of transferred embryos, implantation rates and clinical pregnancy rates per transfer with respect to frozen/vitrified oocytes (FVO) were analysed. These numbers were compared with those obtained using frozen embryos or fresh oocytes. A total of 121,708 cycles were initiated, of which, 7.1% (8682) were FVO cycles and 2.4% (2952) were frozen embryo cycles. Of the 81,786 FVO, 52.5% (42,917) were thawed and 26.9% (22,005) inseminated. Of those inseminated, 68.0% (14,966) yielded good embryos. These numbers were significantly lower than those using fresh oocytes in which 77.9% (197,242; fresh oocytes versus FVO P<0.001) of inseminated oocytes generated good embryos. Implantation rate using FVO was 6.9%, which was significantly lower than that using fresh oocytes (13.5%; P<0.001) and frozen embryos (8.8%; P<0.001). Pregnancy rate per transfer using FVO was 12.5% and significantly lower than that using fresh oocytes (24.9%; P<0.001) or frozen embryos (16.4%; P<0.001). There were 505 deliveries after IVF with FVO and 582 babies.