Publications by authors named "Rhonda Zwingerman"

Article Synopsis
  • The study aimed to assess maternal serum levels of placental growth factor (PlGF), ultrasound placental parameters, and clinical outcomes in IVF frozen embryo transfer (FET) pregnancies, comparing those with and without embryo trophectoderm biopsy.
  • Results showed that median PlGF levels were lower in the FET biopsy group (614.5 pg/mL) compared to the non-biopsy group (717.0 pg/mL), although this difference was not statistically significant.
  • The conclusion suggests a potential link between trophectoderm biopsy and lower PlGF levels, highlighting the need for further research on its impact on placental health.
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Objective: To comprehensively describe current preimplantation genetic testing for aneuploidy (PGT-A) practices and management of non-euploid embryos in Canada.

Methods: This was a cross-sectional study utilizing an online survey distributed by email to all medical directors of fertility clinics with independent in vitro fertilization (IVF) embryology laboratories. The survey was designed to determine practice patterns regarding PGT-A usage; PGT-A reference laboratory, platform, and thresholds for classifying embryos; and management of embryos classified as mosaic, inconclusive, or aneuploid.

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The objective of this guideline from the Canadian Fertility and Andrology Society is to synthesize the evidence on preimplantation genetic testing for aneuploidies (PGT-A) using trophectoderm biopsy and 24-chromosome analysis and to provide clinical recommendations using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) framework. To date, randomized controlled trials have been limited to good-prognosis patients who were able to generate two or more blastocysts for biopsy. In this specific population the GRADE analysis of PGT-A shows an increase in the implantation rate and ongoing pregnancy or delivery rate per transfer.

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Objectifs: Examiner l'approche du dépistage génétique prénatal et du diagnostic des anomalies chromosomiques dans les grossesses conçues par fécondation in vitro à la suite d'un test génétique préimplantatoire des aneuploïdies. PROFESSIONNELS CONCERNéS: Omnipraticiens, médecins de famille, obstétriciens, sages-femmes, infirmières, spécialistes en médecine fœto-maternelle, spécialistes en fertilité, conseillers en génétique, généticiens et autres professionnels de la santé qui participent au dépistage prénatal.

Population Cible: Toute personne ou tout couple dont la grossesse est issue d'une fécondation in vitro et dont l'embryon a préalablement été soumis à un dépistage génétique préimplantatoire des aneuploïdies.

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Objective: To review the approach to prenatal genetic screening and diagnosis for chromosomal abnormalities in pregnancies conceived through in vitro fertilization and following preimplantation genetic testing for aneuploidy.

Intended Users: General practitioners, family physicians, obstetricians, midwives, nurses, maternal-fetal medicine specialists, fertility specialists, genetic counsellors, geneticists, and other health care providers involved in prenatal screening.

Target Population: All individuals or couples who conceivd through in vitro fertilization and underwent preimplantation genetic testing for aneuploidy.

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Background: Online educational information is highly sought out by patients with infertility. This study aims to assess patient-reported usage and helpfulness of fertility educational material on a clinic website and social media accounts.

Methods: Educational material was created on common fertility topics in text and video format and posted on the clinic website and social media accounts.

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Objective: This study sought to review and appraise Apple App Store applications (apps) designed for menstrual cycle tracking, ovulation prediction, and other topics related to fertility or the management of infertility.

Methods: The Apple App Store was systematically searched using the keywords "period tracker," "menstrual tracker," "fertility," "ovulation," "IVF," and "in vitro fertilization." Apps were downloaded after being screened against pre-defined inclusion criteria.

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The objective of this study was to examine a 1-year pilot program aimed at increasing access to fertility preservation (FP) information and services for reproductive-age women newly diagnosed with cancer at a centre geographically remote from a tertiary fertility clinic. An oncofertility nurse navigator (ONN) position was created within the regional cancer centre with the goals of (1) improving local physician knowledge of FP and FP services and (2) improving patient access to FP counselling and services. The ONN identified all women diagnosed with cancer requiring treatment that could impact their fertility and discussed FP options with them and their physicians.

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Objective: This guideline was written to update Canadian maternity care and reproductive healthcare providers on pre- and postconceptional reproductive carrier screening for women or couples who may be at risk of being carriers for autosomal recessive (AR), autosomal dominant (AD), or X-linked (XL) conditions, with risk of transmission to the fetus. Four previous SOGC- Canadian College of Medical Geneticists (CCMG) guidelines are updated and merged into the current document.

Intended Users: All maternity care (most responsible health provider [MRHP]) and paediatric providers; maternity nursing; nurse practitioner; provincial maternity care administrator; medical student; and postgraduate resident year 1-7.

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Objective: The goals of this study were to determine the prevalence and relative frequencies of red blood cell antibodies in a Canadian prenatal population, and to evaluate the fetal and neonatal outcomes of affected pregnancies.

Methods: We conducted a retrospective review of pregnancies that screened positive for red cell antibodies between 2006 and 2010. The following antibodies were included: anti-D, -C, -c, -E, -e, -Fya, -Fyb, -Jka, and-Jkb.

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Gastric cancer (GC) remains a leading cause of cancer mortality worldwide. Genetic factors are implicated, including DNA mismatch repair (MMR) deficiency manifested as tumor microsatellite instability (MSI). However, a standardized panel of markers and a definition of low-versus-high level MSI in GC are lacking.

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