High-risk of preterm birth and low birth weight after oocyte donation IVF: analysis of 133,785 live births

2017 ◽  
Vol 35 (3) ◽  
pp. 318-324 ◽  
Author(s):  
Mohan Shashikant Kamath ◽  
Belavendra Antonisamy ◽  
Mariano Mascarenhas ◽  
Sesh Kamal Sunkara
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
High Risk ◽  
Low Birth Weight ◽  
Oocyte Donation ◽  
Live Births

scholarly journals Pregnancy Outcome during the First COVID 19 Lockdown in Vienna, Austria

2021 ◽  
Vol 18 (7) ◽  
pp. 3782
Author(s):  
Sylvia Kirchengast ◽  
Beda Hartmann
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
Low Birth Weight ◽  
Pregnancy Outcome ◽  
Gestational Age ◽  
Very Low Birth Weight ◽  
Extremely Low Birth Weight ◽  
Negative Effects ◽  
Gestational Length ◽  
Live Births

The COVID 19 pandemic represents a major stress factor for non-infected pregnant women. Although maternal stress during pregnancy increases the risk of preterm birth and intrauterine growth restriction, an increasing number of studies yielded no negative effects of COVID 19 lockdowns on pregnancy outcome. The present study focused on pregnancy outcome during the first COVID 19 lockdown phase in Austria. In particular, it was hypothesized that the national lockdown had no negative effects on birth weight, low birth weight rate and preterm birth rate. In a retrospective medical record-based single center study, the outcome of 669 singleton live births in Vienna Austria during the lockdown phase between March and July 2020 was compared with the pregnancy outcome of 277 live births at the same hospital during the pre-lockdown months of January and February 2020 and, in addition, with the outcome of 28,807 live births between 2005 and 2019. The rate of very low gestational age was significantly lower during the lockdown phase than during the pre-lockdown phase. The rate of low gestational age, however, was slightly higher during the lockdown phase. Mean birth weight was significantly higher during the lockdown phase; the rates of low birth weight, very low birth weight and extremely low birth weight were significantly lower during the lockdown phase. In contrast, maternal gestational weight gain was significantly higher during the lockdown phase. The stressful lockdown phase in Austria seems to have no negative affect on gestational length and newborn weight among non-infected mothers.

scholarly journals Changes in live births, preterm birth, low birth weight, and cesarean deliveries in the United States during the SARS-CoV-2 pandemic

2021 ◽  
Author(s):  
Alison Gemmill ◽  
Joan A. Casey ◽  
Ralph Catalano ◽  
Deborah Karasek ◽  
Tim-Allen Bruckner
Keyword(s):  
Time Series ◽  
Birth Weight ◽  
Preterm Birth ◽  
Low Birth Weight ◽  
Cesarean Delivery ◽  
Very Low Birth Weight ◽  
National Level ◽  
Health Indicators ◽  
The United States ◽  
Live Births

Background: The SARS-CoV-2 pandemic and associated social, economic, and clinical disruption have been widely speculated to affect pregnancy decision-making and outcomes. While a few US-based studies have examined subnational changes in fertility, preterm birth, and stillbirth, there remains limited knowledge of how the pandemic impacted childbearing and a broader set of perinatal health indicators at the national-level throughout 2020. Here, we use recently released national-level data to fill this gap. Importantly, we, unlike earlier work, use time-series methods to account for strong temporal patterning (e.g., seasonality, trend) that could otherwise lead to spurious findings. Methods: For the years 2015 to 2020, we obtained national monthly counts of births and rates (per 100 births) for six perinatal indicators: preterm birth (<37 weeks gestation), early preterm birth (<34 weeks gestation), late preterm birth (34-36 weeks gestation), low birth weight birth (<2500 g), very low birth weight birth (<1500 g), and cesarean delivery. We use an interrupted time-series approach to compare the outcomes observed after the pandemic began (March 2020) to those expected had the pandemic not occurred. Results: For total births as well as five of the six indicators (i.e., all but the rate of cesarean delivery), observed values fall well below expected levels (p<.0001 for each test) during the entire pandemic period. Declines in preterm birth and low birth weight were largest in magnitude in both early and later stages of the 2020 pandemic, while those for live births occurred at the end of the year. Discussion: Our findings provide some of the first national evidence of substantial reductions in live births and adverse perinatal outcomes during the SARS-CoV-2 pandemic. Only cesarean delivery appeared unaffected. These declines were not uniform across the pandemic, suggesting that several mechanisms, which require further study, may explain these patterns.

Prevention of Preterm Births: A Perinatal Study in Haguenau, France

PEDIATRICS ◽  
1985 ◽  
Vol 76 (2) ◽  
pp. 154-158
Author(s):  
E. Papiernik ◽  
J. Bouyer ◽  
J. Dreyfus ◽  
D. Collin ◽  
G. Winisdorffer ◽  
...  
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
Low Birth Weight ◽  
Direct Relationship ◽  
Intervention Study ◽  
Total Duration ◽  
Preterm Births ◽  
Birth Rates ◽  
Live Births ◽  
Mother’S Age

A reduction in preterm births has been observed in Haguenau (Eastern France) during a 12-year intervention study with a program for prevention of preterm deliveries. The Perinatal Study of Haguenau was an observation tool used in a stable population, and it allowed measurement of the way women have progressively responded to the new proposals in prenatal care. It also allowed measurement of the results of the interventions: low birth weight (less than 2,500 g) and preterm birth rates (less than 37 weeks of gestation) among single live births. The total duration of the study was divided into three periods of four years (1971 through 1974, 1975 through 1978, and 1979 through 1982), for which the numbers of single live births are 5,763, 4,957, and 5,919, respectively. For the same periods, the low-birth-weight rates, 4.6%, 4.0%, and 3.8%, respectively, showed a significant decrease (P &lt; .001). Following a similar pattern, the rates of preterm birth were 5.4%, 4.1%, and 3.7% (a significant reduction with P &lt; .001). These improvements in pregnancy outcome do not disappear after standardization of mother's age, high blood pressure, or social class distribution. These findings, which concur with the results of others, enhance the hypothesis of a direct relationship between a prevention program and a reduction in preterm birth rates.

scholarly journals Infant mortality and low birth weight in cities of Northeastern and Southeastern Brazil

2003 ◽  
Vol 37 (6) ◽  
pp. 693-698 ◽  
Author(s):  
Antônio Augusto Moura da Silva ◽  
Heloísa Bettiol ◽  
Marco Antônio Barbieri ◽  
Valdinar Sousa Ribeiro ◽  
Vânia Maria de Farias Aragão ◽  
...  
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
Infant Mortality ◽  
Low Birth Weight ◽  
Perinatal Care ◽  
Northeastern Brazil ◽  
Southeastern Brazil ◽  
Systematic Sampling ◽  
Birth Cohorts ◽  
Live Births

OBJECTIVE: To compare estimates of low birth weight (LBW), preterm birth, small for gestational age (SGA), and infant mortality in two birth cohorts in Brazil. METHODS: The two cohorts were performed during the 1990s, in São Luís, located in a less developed area in Northeastern Brazil, and Ribeirão Preto, situated in a more developed region in Southeastern Brazil. Data from one-third of all live births in Ribeirão Preto in 1994 were collected (2,839 single deliveries). In São Luís, systematic sampling of deliveries stratified by maternity hospital was performed from 1997 to 1998 (2,439 single deliveries). The chi-squared (for categories and trends) and Student t tests were used in the statistical analyses. RESULTS: The LBW rate was lower in São Luís, thus presenting an epidemiological paradox. The preterm birth rates were similar, although expected to be higher in Ribeirão Preto because of the direct relationship between preterm birth and LBW. Dissociation between LBW and infant mortality was observed, since São Luís showed a lower LBW rate and higher infant mortality, while the opposite occurred in Ribeirão Preto. CONCLUSIONS: Higher prevalence of maternal smoking and better access to and quality of perinatal care, thereby leading to earlier medical interventions (cesarean section and induced preterm births) that resulted in more low weight live births than stillbirths in Ribeirão Preto, may explain these paradoxes. The ecological dissociation observed between LBW and infant mortality indicates that the LBW rate should no longer be systematically considered as an indicator of social development.

Female causes of infertility are associated with higher risk of preterm birth and low birth weight: analysis of 117 401 singleton live births following IVF

2020 ◽  
Author(s):  
Sesh Kamal Sunkara ◽  
Belavendra Antonisamy ◽  
Ankita C Redla ◽  
Mohan Shashikanth Kamath
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
Low Birth Weight ◽  
Perinatal Outcomes ◽  
Unexplained Infertility ◽  
Male Factor ◽  
Absolute Increase ◽  
Live Births ◽  
Significant Difference ◽  
Adverse Perinatal Outcomes

Abstract STUDY QUESTION Does the cause of infertility affect the perinatal outcomes preterm birth (PTB) and low birth weight (LBW) following IVF treatment? SUMMARY ANSWER The risk of PTB and LBW was higher with female causes of infertility—ovulatory disorders, tubal disorders and endometriosis—compared to unexplained infertility but the absolute increase in risk was low. WHAT IS KNOWN ALREADY Infertility is associated with an increased risk of adverse perinatal outcomes. Risk of adverse perinatal outcomes is also higher following ART compared to spontaneous conceptions. Infertility can result from female and/or male factors or is unexplained when the cause cannot be delineated by standard investigations. Given that infertility and ART are contributory to the adverse perinatal outcomes, it is a matter of interest to delineate if the specific cause of infertility influences perinatal outcomes following IVF treatment. STUDY DESIGN, SIZE, DURATION Anonymous data were obtained from the Human Fertilization and Embryology Authority (HFEA). The HFEA has collected data prospectively on all ART cycles performed in the UK since 1991. Data from 1991 to 2016 comprising a total of 117 401 singleton live births following IVF with or without ICSI (IVF ± ICSI) for sole causes of infertility were analysed for PTB and LBW. Cycles having more than one cause of infertility and/or multiple births were excluded. PARTICIPANTS/MATERIALS, SETTING, METHODS Data on all women undergoing stimulated IVF ± ICSI treatment cycles were analysed to compare perinatal outcomes of PTB and LBW among singleton live births based on the cause of infertility (ovulatory disorders, tubal disorders, endometriosis, male factor, unexplained). Logistic regression analysis was performed, adjusting for female age category, period of treatment, previous live births, IVF or ICSI, number of embryos transferred and fresh or frozen embryo transfer cycles. MAIN RESULTS AND THE ROLE OF CHANCE Compared to unexplained infertility, the risk of PTB was significantly higher with ovulatory disorders (adjusted odds ratio (aOR) 1.31, 99.5% CI 1.17 to 1.46); tubal disorders (aOR 1.25, 99.5% CI 1.14 to 1.38) and endometriosis (aOR 1.17, 99.5% CI 1.01 to 1.35). There was no significant difference in the risk of PTB with male factor causes compared to unexplained infertility (aOR 1.01, 99.5% CI 0.93, 1.10). The risk of LBW was significantly higher with ovulatory disorders (aOR 1. 29, 99.5% CI 1.16 to 1.44) and tubal disorders (aOR 1.12, 99.5% CI 1.02 to 1.23) and there was no increase in the risk of LBW with endometriosis (aOR 1.11, 99.5% CI 0.96 to 1.30) and male factor causes (aOR 0.94, 99.5% CI 0.87, 1.03), compared to unexplained infertility. LIMITATIONS, REASONS FOR CAUTION Although the analysis was adjusted for several important confounders, there was no information on the medical history of women during pregnancy to allow adjustment. The limitations with observational data would apply to this study, including residual confounding. WIDER IMPLICATIONS OF THE FINDINGS This is the largest study to address the causes of infertility affecting perinatal outcomes of PTB and LBW. The information is important for the management of pregnancies and the underlying reasons for the associations observed need to be further understood. STUDY FUNDING/COMPETING INTEREST(S) No funding was obtained. There are no competing interests to declare. TRIAL REGISTRATION NUMBER N/A.

Impact of Lockdown Measures during COVID-19 Pandemic on Pregnancy and Preterm Birth

2021 ◽  
Author(s):  
Belal Alshaikh ◽  
Po-Yin Cheung ◽  
Nancy Soliman ◽  
Marie-Anne Brundler ◽  
Kamran Yusuf
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
Low Birth Weight ◽  
Pregnancy Outcomes ◽  
Very Low Birth Weight ◽  
Gestational Hypertension ◽  
Cohort Analysis ◽  
Preterm Births ◽  
Live Births ◽  
Very Preterm

Objective The objective of this study is to assess the effect of the lockdown measures during the coronavirus disease 2019 (COVID-19) pandemic on pregnancy outcomes of women who were not affected by severe acute respiratory syndrome coronavirus 2 infection. Study Design We used data from the perinatal health program and neonatal databases to conduct a cohort analysis of pregnancy outcomes during the COVID-19 lockdown in the Calgary region, Canada. Rates of preterm birth were compared between the lockdown period (March 16 to June 15, 2020) and the corresponding pre-COVID period of 2015 to 2019. We also compared maternal and neonatal characteristics of preterm infants admitted to neonatal intensive care units (NICUs) in Calgary between the two periods. Findings A total of 4,357 and 24,160 live births occurred in the lockdown and corresponding pre-COVID period, respectively. There were 366 (84.0 per 1,000 live births) and 2,240 (92.7 per 1,000 live births) preterm births in the lockdown and corresponding pre-COVID period, respectively (p = 0.07). Rates of very preterm and very-low-birth-weight births were lower in the lockdown period compared with the corresponding pre-COVID period (11.0 vs. 15.6 and 9.0 vs. 14.4 per 1,000 live births, p = 0.02 and p = 0.005, respectively). There was no difference in spontaneous stillbirth between the two periods (3.7 vs. 4.1 per 1,000 live birth, p = 0.71). During the lockdown period, the likelihood of multiple births was lower (risk ratio [RR] 0.73, 95% confidence interval [CI]: 0.60–0.88), while gestational hypertension and clinical chorioamnionitis increased (RR 1.24, 95%CI: 1.10–1.40; RR 1.33, 95%CI 1.10–1.61, respectively). Conclusion Observed rates of very preterm and very-low-birth-weight births decreased during the COVID-19 lockdown. Pregnant women who delivered during the lockdown period were diagnosed with gestational hypertension and chorioamnionitis more frequently than mothers in the corresponding pre-COVID period. Key Points

Birth-Weight, Pregnancy Term, Pre-Natal and Natal Complications Related to Child’s Dental Anomalies

2015 ◽  
Vol 39 (4) ◽  
pp. 371-376 ◽  
Author(s):  
T Prokocimer ◽  
E Amir ◽  
S Blumer ◽  
B Peretz
Keyword(s):  
Birth Weight ◽  
Preterm Birth ◽  
High Risk ◽  
Low Birth Weight ◽  
High Risk Pregnancy ◽  
Dental Anomalies ◽  
Tooth Shape ◽  
Number Of Teeth ◽  
Risk Pregnancy ◽  
Physical Status Classification

Objectives: This cross-sectional study was aimed at determining whether certain pre-natal and natal conditions can predict specific dental anomalies. The conditions observed were: low birth-weight, preterm birth, pre-natal & natal complications. The dental anomalies observed were: enamel defects, total number of decayed, missing and filled teeth (total DMFT), disturbances in the tooth shape and disturbances in the number of teeth. Study design: Out of more than 2000 medical files of children aged 2–17 years old which were reviewed, 300 files met the selection criteria. Information recorded from the files included: age, gender, health status (the ASA physical status classification system by the American Society of Anesthesiologists), birth week, birth weight, total DMFT, hypomineralization, abnormal tooth shape, abnormal number of teeth and hypoplasia. Results: Twenty one children out of 300 (7%) were born after a high-risk pregnancy, 25 children (8.3%) were born after high-risk birth, 20 children (6.7%) were born preterm - before week 37, and 29 children (9.7%) were born with a low birth weight (LBW) - 2500 grams or less. A relationship between a preterm birth and LBW to hypomineralization was found. And a relationship between a preterm birth and high-risk pregnancy to abnormal number of teeth was found. No relationship was found between birth (normal/high-risk) and the other parameters inspected. Conclusion: Preterm birth and LBW may predict hypomineralization in both primary and permanent dentitions. Furthermore, the study demonstrated that preterm birth and high-risk pregnancy may predict abnormal number of teeth in both dentitions.

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