Jennifer F. Kawwass

BackgroundWhile extreme ambient heat has been associated with several adverse pregnancy and birth outcomes little is known regarding the link between extreme ambient temperatures and human fertility.ObjectiveTo evaluate the associations bet…

OBJECTIVE: To describe characteristics, trends, and outcomes of international gestational surrogacy cycles in the United States (US). DESIGN: Retrospective cohort study. SETTING: All assisted reproductive technology cycles in the US repor…

OBJECTIVE: To examine trends, characteristics, and outcomes of donor oocyte embryo transfer cycles by original oocyte and resultant embryo state and determine whether oocyte state (fresh or frozen) is differentially associated with clinical…

OBJECTIVE: To determine factors associated with a positive male patient experience (PMPE) at fertility clinics among male patients. DESIGN: Cross-sectional study Setting: Not applicable Patients: Male respondents to the FertilityIQ questio…

OBJECTIVE: To describe the prevalence and treatment characteristics of assisted reproductive technology (ART) cycles involving specific male factor infertility diagnoses in the United States. DESIGN: Cross-sectional analysis of ART cycles …

PURPOSE: To report fertility treatment use and outcomes among patients who use donor sperm for intrauterine insemination (IUI), in vitro fertilization (IVF), and reciprocal IVF (co-IVF). METHODS: This is a retrospective review of patients …

The COVID-19 pandemic has claimed the lives of over one million people worldwide, and has affected all aspects of healthcare worldwide, including the delivery of care to patients with fertility-related diagnoses. In the United States, the r…

PURPOSE: The majority of data regarding oocyte cryopreservation (OC) outcomes focuses on healthy women. We compare trends, cycle characteristics, and outcomes between women freezing oocytes for fertility preservation due to cancer versus el…

OBJECTIVES: To assess trends, predictors, and perinatal outcomes of ovarian hyperstimulation syndrome (OHSS) associated with in vitro fertilization (IVF) cycles in the United States. DESIGN: Retrospective cohort study using National Assist…

Study questionIs the use of donor oocytes in women <35 years of age associated with an increased risk of adverse perinatal outcomes compared to use of autologous oocytes?Summary answerAmong fresh assisted reproductive technology (ART) cycle…

BackgroundInformation regarding the use of donor sperm in assisted reproductive technology, as well as subsequent treatment and perinatal outcomes, remains limited. Outcome data would aid patient counseling and clinical decision making.Obje…

PURPOSE: To compare national trends and perinatal outcomes following the use of ejaculated versus surgically acquired sperm among IVF cycles with male factor infertility. METHODS: This retrospective cohort includes US fertility clinics rep…

OBJECTIVE: To compare characteristics, explore predictors, and compare assisted reproductive technology (ART) cycle, transfer, and pregnancy outcomes of autologous and donor cryopreserved oocyte cycles with fresh oocyte cycles. DESIGN: Ret…

PURPOSE: The purpose of the study was to describe trends in and investigate variables associated with clinical pregnancy and live birth in autologous in vitro fertilization (IVF) cycles among women ≥40 years. METHODS: We used autologous IV…

OBJECTIVE: To examine outcomes of singleton pregnancies conceived without assisted reproductive technology (non-ART) compared with singletons conceived with ART by elective single-embryo transfer (eSET), nonelective single-embryo transfer (…

BACKGROUND: Limited published data exist detailing outcomes of donor embryo cycles. Patients and clinicians would benefit from information specific to donor embryo cycles to inform fertility treatment options, counselling, and clinical deci…

OBJECTIVE: To investigate the associations among underweight body mass index (BMI), pregnancy, and obstetric outcomes among women using assisted reproductive technology (ART). DESIGN: Retrospective cohort study using national data and log …

OBJECTIVE: To characterize risks for early pregnancy loss after fresh and frozen IVF cycles and to investigate whether risk is modified by infertility diagnoses or transfer of embryos in fresh versus frozen cycles. DESIGN: Retrospective co…

OBJECTIVE: To assess endometriosis-associated infertility trends among assisted reproductive technology (ART) cycles, and to compare cancellation and hyperstimulation risks and pregnancy and live birth rates among women using ART for endome…

OBJECTIVE: To evaluate trends of monozygotic twinning after single embryo transfer and its association with patient and treatment factors. METHODS: Our retrospective cohort study included 28,596 pregnancies after fresh, nondonor single emb…

ImportanceIntracytoplasmic sperm injection (ICSI) is increasingly used in patients without severe male factor infertility without clear evidence of a benefit over conventional in vitro fertilization (IVF).ObjectiveTo assess national trends …

ObjectiveTo assess trends and outcomes of assisted hatching among assisted reproductive technology (ART) cycles.DesignRetrospective cohort analysis using National ART Surveillance System (NASS) data.SettingU.S. fertility centers reporting t…