Publications by authors named "Siddhant Ambulkar"

Background: Microdissection testicular sperm extraction (mTESE) is the gold standard treatment for men with non-obstructive azoospermia (NOA). However, many men do not elect to pursue this surgical intervention. We aimed to identify factors associated with NOA patients undergoing mTESE after initial evaluation by a reproductive urologist (RU) through a retrospective cohort study.

View Article and Find Full Text PDF

The characteristics of men who use direct-to-consumer (DTC) men's health services are not well understood. We conducted an online survey of adult men via ResearchMatch, assessing sociodemographic data, health behaviors, and concern for low testosterone and infertility. Logistic regression estimated the association between participant characteristics and familiarity with and reported use of DTC services such as Hims® and Roman®.

View Article and Find Full Text PDF

Purpose: We evaluated whether consideration of body mass index (BMI) and socioeconomic status alters the reported association between race/ethnicity and abnormal semen parameters.

Materials And Methods: We conducted a retrospective review of all men who underwent semen analysis (SA) for fertility evaluation at an integrated academic health care system from 2002 to 2021. Men were excluded if they had a diagnosis of Klinefelter's syndrome, history of varicocele, prior testicular surgery, prior history of chemotherapy or radiation for cancer, or prior testosterone-modulating medication use.

View Article and Find Full Text PDF

Objective: To evaluate the predictors of establishing care with a reproductive urologist (RU) among men with abnormal semen analyses (SAs) ordered by nonurologists and examine patient perceptions of abnormal SAs in the absence of RU consultation.

Design: Retrospective cohort study with cross-sectional survey.

Setting: Large, integrated academic healthcare system during 2002-2019.

View Article and Find Full Text PDF

This study examined the relationship between stimulant medications used for the treatment of attention deficit hyperactivity disorder and semen parameters. We performed a retrospective cohort study at a large, academic institution between 2002 and 2020. We included men with a semen analysis without prior spermatotoxic medication use, empiric medical therapy exposure or confounding medical diagnoses (varicocele, Klinefelter's syndrome, cryptorchidism, cystic fibrosis, diabetes, cancer or cancer-related treatment, and azoospermia).

View Article and Find Full Text PDF

Objective: To characterize the epidemiology of male factor infertility and identify which types of providers are treating infertile men in the United States.

Materials And Methods: The National Ambulatory Medical Care Survey was queried between 2006 and 2016 for all ambulatory care visits. Men with a diagnosis of infertility were identified by international classification of disease coding.

View Article and Find Full Text PDF

Objective: To determine prevalence of hyperprolactinemia and prolactinoma among men presenting for initial fertility evaluation.

Methods: We performed a retrospective review of men presenting for initial fertility evaluation at a tertiary care, academic health system between 1999 and 2018. Men with measured prolactin levels were analyzed to determine prevalence of hyperprolactinemia and prolactinoma.

View Article and Find Full Text PDF

Background: Research shows that emerging adults face numerous stressors as they transition from adolescence to adulthood. This paper investigates university students' lived experiences of maintaining mental well-being during major life events and challenges associated with this transitional period. As we continue to design health technology to support students' mental health needs, it is imperative to understand the fundamental needs and issues particular to this phase of their life to effectively engage and lower the barriers to seeking help.

View Article and Find Full Text PDF

The success of checkpoint inhibitors has validated immunomodulatory agents as a valuable class of anticancer therapeutics. A promising co-stimulatory immunologic target is 4-1BB, or CD137, a member of the tumor necrosis factor receptor superfamily. Ligation of 4-1BB induces an activating signal in CD8(+) T cells and natural killer cells, resulting in increased pro-inflammatory cytokine secretion, cytolytic function, and antibody-dependent cell-mediated cytotoxicity.

View Article and Find Full Text PDF