Karen M. Summers

ORCID: 0000-0001-9868-2385 · 10 papers in corpus
2025
The effect of ejaculatory abstinence time on in vitro fertilization outcomes.
F&S reports ·doi:10.1016/j.xfre.2025.03.003
2025
Time to pregnancy in young women with high response to controlled ovarian stimulation undergoing fresh transfer vs. a freeze-all strategy after in vitro fertilization treatment-a nationwide register-based cohort study.
F&S reports ·doi:10.1016/j.xfre.2025.07.002

ObjectiveTo investigate the time to pregnancy in women ≤37 years of age with high response to controlled ovarian stimulation and undergoing an initial fresh transfer vs. those women proceeding with a freeze-all strategy.DesignA retrospectiv…

article 2024
DIAGNOSIS OF CONCURRENT ENDOMETRIOSIS ALONG WITH OTHER INFERTILITY DIAGNOSES, AND ITS EFFECT ON OUTCOMES OF SINGLE EUPLOID BLASTOCYST TRANSFER (SEBT): A RETROSPECTIVE STUDY OF SARTCORS DATA
·doi:10.1016/j.fertnstert.2024.07.571
2024
Intracytoplasmic sperm injection versus conventional in vitro fertilization in unexplained infertility.
F&S reports ·doi:10.1016/j.xfre.2024.06.003

ObjectiveTo compare cumulative live birth rate (CLBR) and cost-effectiveness of intracytoplasmic sperm injection (ICSI) vs. conventional in vitro fertilization (cIVF).DesignRetrospective cohort study of cycles reported to the Society for As…

2022
Cumulative live birth rate in women aged ≤37 years after in vitro fertilization with or without preimplantation genetic testing for aneuploidy: a Society for Assisted Reproductive Technology Clinic Outcome Reporting System retrospective analysis.
F&S reports ·doi:10.1016/j.xfre.2022.05.004

ObjectiveTo investigate cumulative live birth rates (CLBRs) in cycles with and without preimplantation genetic testing for aneuploidy (PGT-A) among patients aged <35 and 35-37 years.DesignRetrospective cohort study.SettingSociety for Assist…

2022
Fresh Embryo Transfer Cycle Characteristics and Outcomes Following In Vitro Fertilization via Intracytoplasmic Sperm Injection Among Patients With and Without COVID-19 Vaccination.
JAMA network open ·doi:10.1001/jamanetworkopen.2022.8625
2021
Elective transfer of one embryo is associated with a higher cumulative live birth rate and improved perinatal outcomes compared to the transfer of two embryos with in vitro fertilization.
F&S reports ·doi:10.1016/j.xfre.2020.10.011

ObjectiveTo compare the effects of initial elective single embryo transfer (ieSET) and initial double embryo transfer (iDET) strategies on the cumulative live birth rate (CLBR) and perinatal outcomes after IVF.DesignRetrospective cohort stu…

2021
The effect of weight and body mass index on serum progesterone values and live birth rate in cryopreserved in vitro fertilization cycles.
F&S reports ·doi:10.1016/j.xfre.2021.02.005

ObjectiveTo determine if weight or body mass index (BMI) affects the serum progesterone level at the time of the pregnancy test in cryopreserved blastocyst transfer cycles and to determine if those serum progesterone levels affect live birt…

2020
Effect of Folic Acid and Zinc Supplementation in Men on Semen Quality and Live Birth Among Couples Undergoing Infertility Treatment: A Randomized Clinical Trial.
JAMA ·doi:10.1001/jama.2019.18714

ImportanceDietary supplements marketed for male fertility commonly contain folic acid and zinc based on limited prior evidence for improving semen quality. However, no large-scale trial has examined the efficacy of this therapy for improvin…

2018
Difference between mean gestational sac diameter and crown-rump length as a marker of first-trimester pregnancy loss after in vitro fertilization.
Fertility and sterility ·doi:10.1016/j.fertnstert.2017.09.031

ObjectiveTo investigate whether the difference between mean gestational sac diameter and crown-rump length (mGSD - CRL) is associated with first-trimester pregnancy loss or adverse pregnancy outcomes after in vitro fertilization (IVF) and t…