Sexual function is a critical issue for human health and impacts the quality of life of patients and their partners. In this ICSM report, basic science and translational perspectives have been examined from the past decade of literature since the last ICSM report, and have been integrated to produce a state of the art summary of the physiology and molecular biology of sexual function/dysfunction and development of novel nanotechnology-based vehicles and treatments to aid regeneration and clinical translation in men and women.
Objectives
Examine, critically assess, and curate the most important and impactful basic and translational research findings on male and female sexual dysfunction since 2015.
Methods
Literature reviews were performed by a multidisciplinary committee of sexual medicine experts between June 2023 through May 2024. Findings were presented at the ICSM meeting in Madrid (June 2024), and comments from the consultation were incorporated to develop this consensus report.
Results
Erectile dysfunction (ED), which accompanies prostatectomy, diabetes, aging, and vascular disease in men, develops through both common and distinct mechanisms that involve neural injury, penile remodeling (smooth muscle (SM) apoptosis and increased collagen/fibrosis), dysregulated SM contractility, increased oxidative stress, immune response, and genomic instability. In women, disorders of genital pain, arousal, sexual desire, and orgasm involve multiple, overlapping neurological and endocrine mechanisms. Research on ED has been more extensive and the underlying molecular mechanisms have been better characterized than female sexual dysfunction. Future research directions should focus on pathways that underlie penile tissue remodeling and fibrosis associated with cavernous nerve injury in prostatectomy and diabetes, since this leads to irreversible ED. Particular emphasis should be placed on therapeutic targets to improve/enhance nerve regeneration, neuroprotection, "on demand" sexual function, SM contractility/relaxation, oxidative stress, immune response, and hormone function. In women, despite the existence of approved and off-label treatments for disorders of sexual desire and orgasm, the greater influence of psychosocial factors for these aspects of sexual function demands a multidisciplinary approach, along with predictive animal models. Genome-wide association studies have great potential in advancing the field but require replication and functional validation of findings from bioinformatic analyses. Progress in nanotechnology and regenerative therapies offers an exciting frontier in the targeted delivery of ameliorative/restorative treatments.
Conclusions
Research in sexual medicine has expanded through accelerated rates of discovery and increased breadth and diversity. However, much work remains in translating preclinical findings into biomarkers and clinical therapies that can improve patient outcomes.
Rojas HE et al., 2026·Journal of women's health (2002)
To characterize differences between individuals with and without mid-cycle pain in a registry cohort with endometriosis. Prospective analysis of data from the Endometriosis Pelvic Pain Interdisciplinary Cohort Data Registry (Clinicaltrials.gov #NCT02911090) at a tertiary referral center in Western Canada. Three hundred forty-five individuals aged 18-49 years who: (1) had at least one episode of menstrual bleeding in the last 3 months, (2) attended a baseline initial visit, and (3) subsequently had surgery with histological confirmation of endometriosis between January 2018 and December 2023. Exclusion criteria included (1) previous hysterectomy; (2) hormonal suppressive therapy use in the last 3 months; and (3) missing data on mid-cycle pain, history of hormonal therapy use, or menstrual cycle regularity. N/A. Mid-cycle pain in the last month versus No mid-cycle pain in the last month. Of the 345 participants, 67% (n = 232) reported mid-cycle pain in the last month. Mid-cycle pain in the last month was significantly associated with higher mean Central Sensitization Inventory score (48 ± 17 versus 36 ± 16, p < 0.001) and more months of prior hormonal suppressive therapy use (58 [14-120] versus 26 [0-109], p = 0.012). Abnormal anatomy at the time of surgery (e.g., endometrioma, ovarian adhesions) was not associated with mid-cycle pain in the last month. In this endometriosis cohort at a tertiary referral center, most participants reported mid-cycle pain in the last month, which was associated with central sensitization but was not clearly related to endometriosis anatomical distortion.
Bouchard TP et al., 2026·Reproductive biomedicine online·Free to read
Do quantitative urinary hormone measurements on the Mira monitor predict and confirm ovulation accurately compared with ultrasound in women with regular menstrual cycles? Do Mira urine hormones correlate with serum hormones?
This was a prospective, single-centre, blinded diagnostic accuracy study with 52 women aged 19-44 years with regular cycles (24-38 days) who tracked 153 cycles over 18 months. Daily first-morning urine was tested with the Mira monitor for follicle stimulating hormone (FSH), oestrone-3-glucuronide (E13G), luteinizing hormone (LH) and pregnanediol glucuronide (PDG). Serial transvaginal ultrasounds (890 scans) confirmed the day of ovulation. Serum hormones were measured twice per cycle. The 121 ovulatory cycles from 49 participants with sufficient index test and reference standard data were included in the final analysis.
The Mira LH peak day strongly predicted ultrasound-confirmed ovulation (R² = 0.96, P < 0.001; intraclass correlation coefficient = 0.971), with 96% of ovulations occurring within ±1 day. The Mira PDG increase was also strongly associated with ultrasound-confirmed day of ovulation (R² = 0.87, P < 0.001). First-morning urine hormones were significantly associated with serum hormones when collected within 90 min (LH: R² = 0.92; E13G: R² = 0.73; R² = 0.61; R² = 0.75). Anovulatory cycles were identified in 11% of regularly cycling participants.
Quantitative urinary hormone monitoring with the Mira monitor provides accurate prediction and confirmation of ovulation, with strong urine-serum associations supporting reduced reliance on serial serum draws in select patients. These findings support clinical adoption of quantitative urinary fertility monitoring.
Balachandran S et al., 2026·Journal of obstetrics and gynaecology Canada : JOGC = Journal d'obstetrique et gynecologie du Canada : JOGC
To assess the impact of the COVID-19 pandemic on reproductive outcomes in patients with recurrent pregnancy loss (RPL) and the influence of material and social deprivation on these outcomes.
This retrospective cohort study included RPL patients seen at a specialized clinic between March 1, 2018, and February 28, 2022. Patients were categorized into two groups based on care period: pre-pandemic (March 1, 2018-February 29, 2020) and pandemic (March 1, 2020-February 28, 2022). Cumulative probabilities of birth were estimated using the cumulative incidence function within a competing risk framework, treating pregnancy loss as a competing event. Fine and Gray regression models calculated sub-distribution hazard ratio (sHR) of birth.
544 patients were included in the study, with 255 in the pre-pandemic group and 289 in the pandemic group. Individuals in the pandemic group were less likely to achieve pregnancy than those in the pre-pandemic group (relative risk = 0.50, 95% confidence interval [CI] 0.39 - 0.66). Among those who conceived, the cumulative probability of live birth was 0.77 in both groups. Relative to individuals residing in high-social deprivation neighborhoods, those living in moderately deprived areas had higher sub-distribution hazards of live birth (adjusted sHR = 1.97, 95% CI 1.25 - 3.10; P = 0.003).
Within specialized RPL care and a universal maternity care system, pregnancy rates were lower during the first two years of the COVID-19 pandemic. However, among those who conceived, the probability of achieving a live birth remained similar between the pre-pandemic and pandemic periods.
Bouchard TP et al., 2026·Reproductive biomedicine online·Free to read
Does formation of the corpus luteum help to identify the day of ovulation on ultrasound when follicular collapse is missed, and how reliable are sonographers versus a review panel in identifying the day of ovulation on ultrasound? Sonographers in a clinic in Canada performed serial endovaginal ultrasound scans (six to eight per cycle) to identify the day of ovulation in regularly cycling women (n = 40) who were followed for one to five cycles (n = 85). The day of ovulation was identified by: (i) identification of the dominant follicle; (ii) disappearance of the dominant follicle; and (iii) identification and dating of the corpus luteum. The main outcome measures were inter-rater reliability between two sonographers, and Bland-Altman agreement between the supervising sonographer and a panel that reviewed each scan to identify the day of ovulation. Of the 85 menstrual cycles reviewed, two cycles did not have sufficient data to date ovulation, one cycle showed an incidental dermoid cyst, and 11 cycles showed anovulatory patterns. This left a total of 71 cycles (84%) for which intra-rater reliability between two sonographers for identifying the day of ovulation was high (intraclass correlation coefficient = 0.99, P < 0.0001), and Bland-Altman agreement showed no significant difference in the estimated day of ovulation between the supervising sonographer and the panel (t = -0.28, P = 0.78). Corpus luteum criteria were necessary to help identify the day of ovulation in 14 of 71 cycles (20%). The estimated day of ovulation can be determined reliably on ultrasound by trained sonographers using collapse of the dominant follicle and formation of the corpus luteum based on six to eight scans per cycle.
Related research
Guidelines by Clinical Area · Bone and Endocrine Guidelines
Corona G et al., 2023·Journal of endocrinological investigation·Free full text on PubMed Central
Erectile dysfunction (ED) is one of the most prevalent male sexual dysfunctions. ED has been in the past mistakenly considered a purely psycho-sexological symptom by patients and doctors. However, an ever-growing body of evidence supporting the role of several organic factors in the pathophysiological mechanisms underlying ED has been recognized.
The Italian Society of Andrology and Sexual Medicine (SIAMS) commissioned an expert task force involving several other National Societies to provide an updated guideline on the diagnosis and management of ED. Derived recommendations were based on the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) system.
Several evidence-based statements were released providing the necessary up-to-date guidance in the context of ED with organic and psychosexual comorbidities. Many of them were related to incorrect lifestyle habits suggesting how to associate pharmacotherapies and counseling, in a couple-centered approach. Having the oral therapy with phosphodiesterase type 5 inhibitors as the gold standard along with several other medical and surgical therapies, new therapeutic or controversial options were also discussed.
These are the first guidelines based on a multidisciplinary approach that involves the most important Societies related to the field of sexual medicine. This fruitful discussion allowed for a general agreement on several recommendations and suggestions to be reached, which can support all stakeholders in improving couple sexual satisfaction and overall general health.
Guidelines by Clinical Area · Bone and Endocrine Guidelines
Isidori AM et al., 2015·Journal of endocrinological investigation·Free full text on PubMed Central
We developed clinical practice guidelines to assess the individual risk-benefit profile of androgen replacement therapy in adult male hypogonadism (HG), defined by the presence of specific signs and symptoms and serum testosterone (T) below 12 nmol/L.
The task force consisted of eight clinicians experienced in treating HG, selected by the Italian Society of Endocrinology (SIE). The authors received no corporate funding or remuneration.
Consensus was guided by a systematic review of controlled trials conducted on men with a mean T < 12 nmol/L and by interactive discussions. The guidelines were reviewed and sequentially approved by the SIE Guidelines Commission and Executive Committee.
We recommend T supplementation (TS) for adult men with severely reduced T levels (T < 8 nmol/L) to improve body composition and sexual function. We suggest that TS be offered to subjects with T < 12 nmol/L to improve glycaemic control, lipid profile, sexual function, bone mineral density, muscle mass and depressive symptoms, once major contraindications have been ruled out. We suggest that lifestyle changes and other available interventions (e.g. for erectile dysfunction) be suggested prior to TS. We suggest that TS should be combined with currently available treatments for individuals at high risk for complications, such as those with osteoporosis and/or metabolic disorders. We recommend against using TS to improve cardiac outcome and limited mobility. We recommend against using TS in men with prostate cancer, unstable cardiovascular conditions or elevated haematocrit. The task force places a high value on the timely treatment of younger and middle-aged subjects to prevent the long-term consequences of hypoandrogenism.
Vieira LR et al., 2026·Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer
Breast cancer survivors undergoing hormone therapy frequently experience vaginal pain and sexual dysfunction, which negatively affect quality of life. These symptoms are often undertreated, and new therapeutic approaches are needed. To evaluate the effects of photobiomodulation (PBM) on vaginal pain, sexual function, safety, and tolerability in women with breast cancer undergoing hormone therapy. A prospective, quasi-experimental clinical study was conducted with 24 women presenting hormone therapy-induced sexual dysfunction, who underwent four weekly intra- and extra-cavitary PBM sessions (blue LED-440 nm, 8 min; red LED-660 nm, 20 min). Eight eligible participants who declined the intervention due to embarrassment were followed as an untreated observational group. Assessments were performed before and after the intervention using the Female Sexual Quotient Questionnaire (QS-F) and the Visual Analog Scale (VAS) for vaginal pain. At baseline, 82.6% of participants reported maximum vaginal pain (VAS = 10), and 78.2% presented absent or severely impaired sexual function. After four PBM sessions, 79.1% of the women reported complete absence of pain, with mean VAS scores decreasing from 9.46 ± 0.98 to 1.04 ± 2.17 (p < 0.0001). Sexual function also improved significantly, with mean QS-F scores increasing from 23.25 ± 23.47 to 87.21 ± 17.93 (p < 0.0001), and 95.8% of participants reporting good to excellent sexual function after treatment. The intervention was well tolerated, with no adverse events reported. The observational group showed no changes in the evaluated outcomes. PBM proved to be safe, well tolerated, and clinically effective in reducing vaginal pain and improving sexual function in women with breast cancer undergoing hormone therapy, representing a promising therapeutic alternative.
Nowosielski K et al., 2020·Menopause (New York, N.Y.)
The menopausal transition is a biological adaptation to the variety of life changes (body, comorbidities, relationship), but that biology is not an "end all" in the context of sexual function and overall sexual health. The aim of this study is to evaluate determinants altering the risk of female sexual dysfunction (FSD) and other sexual problems and to establish whether menopausal hormonal therapy (MHT) decreases that risk and modifies sexual behaviors.
A cross-sectional observational study was conducted in 210 women between the ages of 45 and 55. Two groups were identified: MHT users (n = 107) and controls-MHT non-users (n = 103). Diagnostic and Statistical Manual of Mental Disorders -five criteria were used to assess sexual dysfunction. Sexual problems were evaluated by the Changes in Sexual Function Questionnaire (CSFQ), body image by Body Exposure during Sexual Activity Questionnaire, and quality of relationship by the Well-Match Relationship Questionnaire. Logistic regression was used to determine the risk factors for FSD and sexual problems.
Women using MHT had higher body esteem during sexual activities, better sexual function (CSFQ) in all domains except desire/interest, better quality of relationship, and lower prevalence of FSD and sexual complaints (CSFQ) except arousal/excitement problems. However, self-rated effects of MHT on sexual behaviors showed that MHT did not play a major role. Women with secondary and higher education (OR = 0.09, CI: 0.02-0.4; P < 0.01 and OR = 0.2, CI: 0.05-1.0; P < 0.05, respectively) and with a higher number of lifetime sexual partners (OR = 0.6, CI: 0.4-0.9; P < 0.01) were less likely to have FSD. In contrast, individuals with more anxious behaviors during sexual activity (OR = 3.2, CI: 1.3-7.3; P < 0.01) and with more severe menopausal symptoms (OR = 1.1, CI: 1.0-1.2; P < 0.001) were more likely to have FSD. Using MHT was not associated with that risk nor with sexual function.
In women during menopausal transition, sexual behaviors were different in MHT users compared with non-users. However, in this cross-sectional observational study conducted in 210 women between the ages of 45 to 55 years, using MHT was not associated with modification of sexual function, decreasing the risk of sexual dysfunction, nor sexual problems.
Clinical Guidelines and Standards › Guidelines by Issuing Body › Specialty and Consensus Panels
Noel N Kim, Hunter Wessells, Michael E DiSanto, Monica G Ferrini, Guiting Lin, James G Pfaus, Fernanda Priviero, Paul J Yong, Carol A Podlasek
N Kim, H Wessells, Mike DiSanto, M DiSanto, M Ferrini, G Lin, Jim Pfaus, Jimmy Pfaus, J Pfaus, F Priviero, P Yong, C Podlasek
PMID 40693915 40693915 DOI 10.1093/sxmrev/qeaf032 10.1093/sxmrev/qeaf032 Kim et al. 2025, Kim 2025
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