Publications by authors named "Leo Pomar"

Purpose: To describe an international response to the COVID-19 pandemic by estimating the prevalence of medication use for COVID-19 treatment in pregnancy, stratified by hospitalization, trimester of pregnancy, and country.

Methods: We conducted a two-stage individual participant data meta-analysis of proportions from primary data on medications used to treat COVID-19 during pregnancy. A common data model was developed to pool the data from single-country and international registries.

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Background: In Switzerland, cytomegalovirus (CMV) is the most common congenital infection, affecting more than 400 newborns per year. It is also the leading non-genetic cause of neurosensory impairment in children. The aims of this study were to assess the awareness, general knowledge and knowledge of hygiene measures related to CMV among pregnant women in French-speaking Switzerland, as well as identify baseline characteristics potentially associated with a better knowledge of CMV.

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Objectives: Data are lacking regarding the long-term consequences of SARS-CoV-2 and COVID-19 mRNA vaccine on infants exposed in utero. We aimed to evaluate the neurodevelopment of infants exposed prenatally to SARS-CoV-2 or mRNA-COVID-19 vaccine during pregnancy at 12 months after birth.

Methods: Infants born to mothers exposed to SARS-CoV-2 or mRNA-COVID-19 vaccine during pregnancy, or unexposed to either the virus or the vaccine were enrolled from 2021 to 2023.

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Objective: To assess the accuracy of corpus callosum (CC) biometry, including sub-segments, using 3D super-resolution fetal brain MRI (SR) compared to 2D or 3D ultrasound (US) and clinical low-resolution T2-weighted MRI (T2WS).

Method: Fetal brain biometry was conducted by two observers on 57 subjects [21-35 weeks of gestational age (GA)], including 11 cases of partial CC agenesis. Measures were performed by a junior observer (obs1) on US, T2WS and SR and by a senior neuroradiologist (obs2) on T2WS and SR.

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Purpose: Over the past decade, the Amazon basin has faced numerous infectious epidemics. Our comprehension of the actual extent of these infections during pregnancy remains limited. This study aimed to clarify the clinical and epidemiological features of emerging and re-emerging infectious diseases during pregnancy in western French Guiana and along the Maroni River over the previous nine years.

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Background: Cytomegalovirus is responsible for the most common congenital infection, affecting 0.5% to 1.0% of live births in Europe.

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Background: Lack of Cytomegalovirus (CMV) knowledge among healthcare professionals has been proven to be the main threat to pregnant women's awareness, preventing them from reducing the risk of infection. The aims of this study were to assess the knowledge and practices of French-speaking Swiss perinatal professionals in terms of CMV prevention, as well as the sociodemographic-professional factors that influence them.

Methods: This observational study used a cross-sectional design to collect data-via an anonymous electronic questionnaire in French distributed to gynecologists-obstetricians, general practitioners and midwives via various channels: e-mails and social networks of partner centers, professional associations, and conferences.

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Article Synopsis
  • Mosquito-borne diseases like Zika are a big worry because they can seriously affect pregnant women and their babies, especially in poorer countries where not much research is done.
  • Even though millions of people get these diseases, there's not enough information about how they impact pregnant women, which can lead to serious health issues for mothers and babies.
  • It's really important to study these diseases more, create better tests and treatments, and develop vaccines to help protect pregnant women and improve healthcare for everyone around the world.
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Objective: To assess fetal and neonatal eyes abnormalities and their progression during the last ZIKV outbreak and summarize learned lessons.

Methods: A systematic review and meta-analysis was conducted by a team of obstetricians and ophthalmologists.

Results: Studies reporting ocular abnormalities during the prenatal ( = 5) and postnatal ( = 24) periods were included in the analysis.

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Objective: The aim of this study was to describe different causes and consequences of fever during pregnancy in Western French Guiana and along the Maroni River.

Study Design: A retrospective single-center study including all patients with a history of documented fever ≥ 38°C during pregnancy at the West French Guiana Hospital for 9 years. Postpartum fever and nosocomial infections were excluded.

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Objectives: This study aimed to evaluate the risk of congenital malformation among pregnant women exposed to the mRNA COVID-19 vaccines during the first trimester of pregnancy, which is a developmental period where the foetus is at risk of teratogenicity.

Methods: Pregnant women were prospectively enrolled from March 2021 to March 2022, at the time of COVID-19 vaccination. Pregnant women exposed to at least one dose of mRNA COVID-19 vaccine from conception to 11 weeks of gestations and 6 days were compared with pregnant women exposed to the vaccine from 12 weeks to the end of pregnancy.

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With COVID-19 vaccination hesitancy at around 50% in the obstetric population, it is critical to identify which women should be addressed and how. Our study aimed to assess COVID-19 vaccination willingness among pregnant and postpartum women in Europe and to investigate associated determinants. This study was a cross-sectional, web-based survey conducted in Belgium, Norway, Switzerland, The Netherlands, and United Kingdom (UK) in June-August 2021.

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Article Synopsis
  • * Various prevention strategies exist during pregnancy to reduce the risks and effects of CMV, such as educating women about hygiene, developing vaccines, and screening for the virus.
  • * This review evaluates the effectiveness of these prevention methods, including prenatal diagnosis and treatments aimed at protecting both the mother and the child from CMV complications.
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Objective: We aimed to describe the epidemiology of intrauterine fetal deaths in multiethnic western French Guiana and to assess its main causes and risk factors.

Study Design: A retrospective descriptive study was conducted based on data from January 2016 to December 2021. All information on stillbirth with a gestational age ≥20 weeks in the Western French Guiana Hospital Center was extracted.

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  • Gómez-López-Hernández syndrome (GLHS) is a rare neurocutaneous condition characterized by a triad of symptoms: rhombencephalosynapsis, bilateral focal alopecia, and trigeminal anesthesia, but has a wider clinical spectrum including craniofacial and neurodevelopmental anomalies.
  • A case of GLHS was diagnosed before birth, exhibiting significant features like hydrocephaly and various craniofacial anomalies, which were confirmed through autopsy after a pregnancy was terminated at 23 weeks.
  • Prenatal diagnosis relies on neuroimaging and identifying associated craniofacial abnormalities since typical genetic causes haven't been found, categorizing GLHS as possible if specific features like RES and certain facial structures are present.*
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Article Synopsis
  • SARS-CoV-2 positive pregnant women have a varying risk of severe maternal adverse outcomes depending on the circulating variant, with higher risks during the Delta variant wave.
  • A study of 2055 unvaccinated pregnant women from March 2020 to September 2022 showed 3.4% had severe outcomes in the pre-Delta period, increasing to 6.5% during Delta, and decreasing to 1.0% during Omicron.
  • The study also highlighted that pregnancy complications were common across all periods, with stillbirth rates rising significantly during the Delta wave.
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Lymphocytic choriomeningitis virus (LCMV) is an emerging neuroteratogen which can infect humans via contact with urine, feces, saliva, or blood of infected rodents. When the infection occurs during pregnancy, there is a risk of transplacental infection with subsequent neurological or visual impairment in the fetus. In this article, we describe a case report of congenital LCMV infection, including fetal imaging, confirmed by positive LCMV IgM in fetal blood and cerebrospinal fluid.

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Monkeypox virus (MPXV) has emerged as a threatening zoonosis. Its spread around the world has been growing fast over the last 2 years, particularly in 2022. The reasons for this sudden spread are probably multifactorial.

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Aim: The objective of this study was to describe the use of COVID-19-related medicines during pregnancy and their evolution between the early/late periods of the pandemic.

Methods: Pregnant women who tested positive for SARS-CoV-2 from March 2020 to July 2021 were included using the COVI-PREG registry. Exposure to the following COVID-19-related medicines was recorded: antibiotics, antivirals, hydroxychloroquine, corticosteroids, anti-interleukin-6 and immunoglobulins.

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