Karen Summers — Endo Lab

other 2025

The effect of ejaculatory abstinence time on in vitro fertilization outcomes

F&S reports ·doi:10.1016/j.xfre.2025.03.003

observational 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

OBJECTIVE: To 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. DESIGN: A retros…

other 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

This cohort study examines the association of COVID-19 vaccination status and in vitro fertilization (IVF)-fresh embryo transfer cycle stimulation characteristics and outcomes.

rct 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

IMPORTANCE: Dietary 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 improv…

observational 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

OBJECTIVE: To 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…