Li, Z, Wang, AY, Bowman, M, Hammarberg, K, Farquhar, C, Johnson, L, Safi, N & Sullivan, EA 2019, 'Cumulative live birth rates following a 'freeze-all' strategy: a population-based study.', Human reproduction open, vol. 2019, no. 2, pp. 1-9.View/Download from: UTS OPUS or Publisher's site
STUDY QUESTION:What is the cumulative live birth rate following a 'freeze-all' strategy compared with a 'fresh-transfer' strategy? SUMMARY ANSWER:The 'freeze-all' strategy resulted in a similar cumulative live birth rate as the 'fresh-transfer' strategy among high responders (>15 oocytes retrieved) but did not benefit normal (10-15 oocytes) and suboptimal responders (<10 oocytes). WHAT IS KNOWN ALREADY:Frozen-thawed embryo transfer is associated with a decreased risk of adverse obstetric and perinatal outcomes compared with fresh embryo transfer. It is unclear whether the 'freeze-all' strategy should be offered to all women undergoing ART treatment. STUDY DESIGN SIZE DURATION:A population-based retrospective cohort study using data collected by the Victorian Assisted Reproductive Treatment Authority. This study included 14 331 women undergoing their first stimulated ART cycle with at least one oocyte fertilised between 1 July 2009 and 30 June 2014 in Victoria, Australia. Demographic characteristics, type of ART procedures and resulting pregnancy and birth outcomes were recorded for the stimulated cycle and associated thaw cycles until 30 June 2016, or until a live birth was achieved, or until all embryos from the stimulated cycle had been used. PARTICIPANTS/MATERIALS SETTING METHODS:Women were grouped by whether they had undergone the 'freeze-all' strategy (n = 1028) where all embryos were cryopreserved for future transfer, or the 'fresh-transfer' strategy (n = 13 303) where selected embryo(s) were transferred in the stimulated cycle, and remaining embryo(s) were cryopreserved for future use. A discrete-time survival model was used to evaluate the cumulative live birth rate following 'freeze-all' and 'fresh-transfer' strategy. MAIN RESULTS AND THE ROLE OF CHANCE:A total of 1028 women undergoing 'freeze-all' strategy and 13 303 women undergoing 'fresh-transfer' strategy had 1788 and 22 334 embryo transfer cycles resulting in 452 and 5126 live births, respectively....
Safi, N, Sullivan, E, Li, Z, Brown, M, Hague, W, McDonald, S, Peek, MJ, Makris, A, O'Brien, AM & Jesudason, S 2019, 'Serious kidney disease in pregnancy: an Australian national cohort study protocol', BMC NEPHROLOGY, vol. 20.View/Download from: UTS OPUS or Publisher's site
Li, Z, Wang, AY, Bowman, M, Hammarberg, K, Farquhar, C, Johnson, L, Safi, N & Sullivan, EA 2018, 'ICSI does not increase the cumulative live birth rate in non-male factor infertility.', Human reproduction (Oxford, England), vol. 33, no. 7, pp. 1322-1330.View/Download from: UTS OPUS or Publisher's site
STUDY QUESTION:What is the cumulative live birth rate following ICSI cycles compared with IVF cycles for couples with non-male factor infertility? SUMMARY ANSWER:ICSI resulted in a similar cumulative live birth rate compared with IVF for couples with non-male factor infertility. WHAT IS KNOWN ALREADY:The ICSI procedure was developed for couples with male factor infertility. There has been an increased use of ICSI regardless of the cause of infertility. Cycle-based statistics show that there is no difference in pregnancy rates between ICSI and IVF in couples with non-male factor infertility. However, evidence indicates that ICSI is associated with an increased risk of adverse perinatal outcomes. STUDY DESIGN, SIZE, DURATION:A population-based cohort of 14 693 women, who had their first ever stimulated cycle with fertilization performed for at least one oocyte by either IVF or ICSI between July 2009 and June 2014 in Victoria, Australia was evaluated retrospectively. The pregnancy and birth outcomes following IVF or ICSI were recorded for the first oocyte retrieval (fresh stimulated cycle and associated thaw cycles) until 30 June 2016, or until a live birth was achieved, or until all embryos from the first oocyte retrieval had been used. PARTICIPANTS/MATERIALS, SETTING, METHODS:Demographic, treatment characteristics and resulting outcome data were obtained from the Victorian Assisted Reproductive Treatment Authority. Data items in the VARTA dataset were collected from all fertility clinics in Victoria. Women were grouped by whether they had undergone IVF or ICSI. The primary outcome was the cumulative live birth rate, which was defined as live deliveries (at least one live birth) per woman after the first oocyte retrieval. A discrete-time survival model was used to evaluate the cumulative live birth rate following IVF and ICSI. The adjustment was made for year of treatment in which fertilization occurred, the woman's and male partner's age at first stimulated cycle,...
Wang, AY, Safi, N, Ali, F, Lui, K, Li, Z, Umstad, MP & Sullivan, EA 2018, 'Neonatal outcomes among twins following assisted reproductive technology: an Australian population-based retrospective cohort study.', BMC pregnancy and childbirth, vol. 18, no. 1, pp. 320-320.View/Download from: UTS OPUS or Publisher's site
While their incidence is on the rise, twin pregnancies are associated with risks to the mothers and their babies. This study aims to investigate the likelihood of adverse neonatal outcomes of twins following assisted reproductive technology (ART) compared to non-ART twins.A retrospective population study using the Australian National Perinatal Data Collections (NPDC) which included 19,662 twins of ≥20 weeks gestational age or ≥ 400 g birthweight in Australia. Maternal outcomes and neonatal outcomes (preterm birth, low birth weight, resuscitation and neonatal death) were compared. Generalized Estimating Equations were used to assess the likelihood of any neonatal outcomes, with adjusted odds ratio (AOR) and 95% confidence intervals (CI) presented. Weinberg's differential rule was used to estimate monozygotic twin rate.ART mothers were 3.3 years older than non-ART mothers. The rates of pregnancy-induced hypertension and gestational diabetes were significantly higher for ART mothers than non-ART mothers (12.2% vs. 8.4%, p < 0.01) and (9.7% vs. 7.5%, p < 0.01) respectively. The incidence of monozygotic twins was 2.0% for ART twins and 1.1% for non-ART twins. Compared with non-ART twins, ART twins had higher rates of preterm birth (AOR 1.13, 95% CI: 1.05-1.22), low birth weight (AOR 1.13, 95% CI: 1.05-1.22), and resuscitation (AOR 1.26, 95% CI: 1.17-1.36). Liveborn ART twins had 28% (AOR 1.28, 95% CI 1.09-1.50) increased odds of having any adverse neonatal outcome compared to liveborn non-ART twins, especially for opposite-sex ART twins (AOR 1.42, 95% CI 1.11-1.82).As ART twins had higher rates of adverse outcome, special prenatal care is recommended. Couples accessing ART should be fully informed of the risk of adverse outcome of twin pregnancies.
Sullivan, EA, Javid, N, Duncombe, G, Li, Z, Safi, N, Cincotta, R, Homer, CSE, Halliday, L & Oyelese, Y 2017, 'Vasa Previa Diagnosis, Clinical Practice, and Outcomes in Australia.', Obstetrics and Gynecology, vol. 130, no. 3, pp. 591-598.View/Download from: UTS OPUS or Publisher's site
To estimate the incidence of women with vasa previa in Australia and to describe risk factors, timing of diagnosis, clinical practice, and perinatal outcomes.A prospective population-based cohort study was undertaken using the Australasian Maternity Outcomes Surveillance System between May 1, 2013, and April 30, 2014, in hospitals in Australia with greater than 50 births per year. Women were included if they were diagnosed with vasa previa during pregnancy or childbirth, confirmed by clinical examination or placental pathology. The main outcome measures included stillbirth, neonatal death, cesarean delivery, and preterm birth.Sixty-three women had a confirmed diagnosis of vasa previa. The estimated incidence was 2.1 per 10,000 women giving birth (95% CI 1.7-2.7). Fifty-eight women were diagnosed prenatally and all had a cesarean delivery. Fifty-five (95%) of the 58 women had at least one risk factor for vasa previa with velamentous cord insertion (62%) and low-lying placenta (60%) the most prevalent. There were no perinatal deaths in women diagnosed prenatally. For the five women with vasa previa not diagnosed prenatally, there were two perinatal deaths with a case fatality rate of 40%. One woman had an antepartum stillbirth and delivered vaginally and the other four women had cesarean deliveries categorized as urgent threat to the life of a fetus with one neonatal death. The overall perinatal case fatality rate was 3.1% (95% CI 0.8-10.5). Two thirds (68%) of the 65 neonates were preterm and 29% were low birth weight.The outcomes for neonates in which vasa previa was not diagnosed prenatally were inferior with higher rates of perinatal morbidity and mortality. Our study shows a high rate of prenatal diagnosis of vasa previa in Australia and associated good outcomes.
Yeo, KT, Safi, N, Wang, AW, Le Marsney, R, Schindler, T, S, B, Haslam, R & Lui, K 2017, 'Prediction of outcomes of extremely low gestational age newborns in Australia and New Zealand', BMJ Paediatrics Open, vol. 1, no. 1, pp. 1-8.View/Download from: UTS OPUS or Publisher's site
Objective To determine the accuracy of the National Institute of Child Health and Human Development (NICHD) calculator in predicting death and neurodevelopmental impairment in Australian and New Zealand infants.
Design Population-based cohort study.
Setting Australia and New Zealand.
Patients Preterm infants 22–25 completed weeks gestation.
Interventions Comparison of NICHD calculator predicted rates of death and death or neurodevelopmental impairment, with actual rates recorded in the Australian and New Zealand Neonatal Network cohort.
Main outcome measures Infant death and death or neurodevelopmental impairment rates.
Results A total of 714 infants were included in the study. Of these infants, 100 (14.0%) were <24 weeks, 389 (54.5%) male, 529 (74.1%) were singletons, 42 (5.9%) had intrauterine growth restriction, 563 (78.9%) received antenatal steroids and 625 (87.5 %) were born in a tertiary hospital. There were 288 deaths (40.3%), 75 infants (10.5%) with neurodevelopment impairment and 363 (50.8%) with death or neurodevelopmental impairment. The area under the curve (AUC) for prediction of death and the composite death or neurodevelopmental impairment by the NICHD calculator in our population was 0.65(95% CI 0.61 to 0.69) and 0.65 (95% CI 0.61 to 0.69), respectively. When stratified and compared with gestational age outcomes, the AUC did not change substantially for the outcomes investigated. The calculator was less accurate with outcome predictions at the extreme categories of predicted outcomes—underestimation of outcomes for those predicted to have the lowest risk (<20%) and overestimation for those in the highest risk category (>80%).
Conclusion In our recent cohort of extremely preterm infants, the NICHD model does not accurately predict outcomes and is marginally better than gestational age based outcomes.