Ejaculatory frequency and male fertility: a literature review of evidence-based recommendations
Review Article

Ejaculatory frequency and male fertility: a literature review of evidence-based recommendations

Nathan Clay1 ORCID logo, Mathew Zleczewski1, Florian Stroie2 ORCID logo

1University of Illinois College of Medicine-Peoria, Peoria, IL, USA; 2Men’s Health and Reproductive Urology, Cook County Health, Chicago, IL, USA

Contributions: (I) Conception and design: All authors; (II) Administrative support: None; (III) Provision of study materials or patients: None; (IV) Collection and assembly of data: N Clay, M Zleczewski; (V) Data analysis and interpretation: All authors; (VI) Manuscript writing: All authors; (VII) Final approval of manuscript: All authors.

Correspondence to: Nathan Clay, BS. University of Illinois College of Medicine-Peoria, One Illini Drive, Peoria, IL 61605, USA. Email: nathanclay8@gmail.com.

Background and Objective: Ejaculatory frequency is a modifiable behavioral factor known to influence semen quality and male fertility. While abstinence may increase semen volume and total sperm count, extended intervals can impair sperm motility and DNA integrity. The optimal abstinence duration for natural conception and assisted reproductive technologies (ARTs) remains under active investigation. This literature review evaluates the impact of ejaculatory frequency and abstinence length on key sperm parameters and fertility outcomes and aims to inform evidence-based guidance recommendations for men actively attempting conception.

Methods: A structured literature review was conducted using PubMed and Google Scholar. Studies were included if they evaluated men of reproductive age, compared varying ejaculatory frequencies or abstinence intervals, and reported semen parameters or fertility outcomes. Data were synthesized thematically across four domains: (I) semen volume and count; (II) motility and viability; (III) DNA fragmentation; and (IV) fertility outcomes including pregnancy and live birth rates.

Key Content and Findings: Prolonged abstinence (≥4 to 7 days) increased semen volume and sperm count but was associated with reduced motility and higher DNA fragmentation. Shorter abstinence (≤2 days), including daily ejaculation, yielded fresher sperm with superior motility and DNA integrity, particularly among subfertile men. Clinical studies demonstrated equivalent or improved pregnancy rates with shorter abstinence intervals across natural conception, intrauterine insemination (IUI), and in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI).

Conclusions: Frequent ejaculation—defined as shorter abstinence intervals—is associated with improved sperm function and may enhance fertility outcomes. While individualized approaches are warranted, current evidence supports ejaculation every 1 to 2 days for men attempting conception. Future guidelines should reconsider traditional abstinence recommendations to reflect these findings.

Keywords: Ejaculatory frequency; ejaculatory abstinence; male fertility; semen quality; sperm motility

Submitted Nov 15, 2025. Accepted for publication Jan 09, 2026. Published online Feb 11, 2026.

doi: 10.21037/tau-2025-aw-847

Introduction

Semen quality is a key determinant of male fertility, and ejaculatory frequency is a modifiable behavioral factor associated with changes in sperm parameters. Sperm are produced continuously and stored in the epididymis, where the duration of storage—affected by ejaculatory abstinence—can alter semen composition and quality. Prolonged abstinence allows for greater sperm accumulation, increasing semen volume and total sperm count, whereas more frequent ejaculation may favor the release of newer sperm with improved functional characteristics (1).

Current World Health Organization (WHO) guidelines recommend 2 to 7 days of abstinence prior to semen analysis (2). Importantly, this recommendation was established to standardize semen collection and laboratory assessment rather than to define an abstinence interval that optimizes fertility outcomes. Consequently, this guideline may not reflect the optimal duration for maximizing sperm function, particularly in the context of natural conception or assisted reproduction. Evidence suggests that while sperm concentration peaks with abstinence of up to 7 days, extended storage is associated with oxidative stress, increased DNA fragmentation, and reduced motility (3). In parallel, increased public and social media interest in ejaculatory abstinence has influenced patient beliefs and counseling encounters, further highlighting the need for evidence-based guidance.

Emerging evidence suggests that frequent ejaculation may improve sperm quality, especially among subfertile men (4). Daily ejaculation has been shown to lower DNA fragmentation index (DFI) and maintain motility, albeit with a reduction in semen volume (5). These findings raise questions about the clinical value of semen retention and support more frequent ejaculation as a strategy to optimize sperm function.

We reviewed studies comparing prolonged abstinence with frequent ejaculation, focusing on key sperm parameters—volume, count, motility, morphology, and DNA fragmentation—and their relationship to fertility outcomes. We also explore the underlying physiological mechanisms to inform evidence-based, individualized recommendations for men seeking to optimize their reproductive potential. We present this article in accordance with the Narrative Review reporting checklist (available at https://tau.amegroups.com/article/view/10.21037/tau-2025-aw-847/rc).

Methods

We conducted a structured narrative literature review to evaluate the relationship between ejaculatory frequency or abstinence duration and semen quality and fertility outcomes. A comprehensive literature search was performed in PubMed on April 15, 2025, using the following Boolean search string: (“ejaculatory frequency” OR “abstinence interval” OR “ejaculation interval”) AND (“male fertility” OR “sperm quality” OR “semen parameters” OR “sperm motility” OR “sperm count” OR “sperm DNA fragmentation” OR “assisted reproduction”). No date restrictions were applied; all available studies up to April 15, 2025 were considered. Only peer-reviewed human studies in English were included. The detailed search strategy is summarized in Table 1.

Table 1

Summary of search strategy for identifying studies on ejaculatory frequency and male fertility

Items Specification
Date of search April 15th 2025
Databases and other sources searched PubMed
Search terms used (“ejaculatory frequency” OR “abstinence interval” OR “ejaculation interval”) AND (“male fertility” OR “sperm quality” OR “semen parameters” OR “sperm motility” OR “sperm count” OR “sperm DNA fragmentation” OR “assisted reproduction”)
Timeframe No date restrictions applied; all available studies up to April 15, 2025 were considered
Inclusion and exclusion criteria Included: peer-reviewed human studies in English; randomized controlled trials, cohort studies, cross-sectional studies, and reviews reporting on semen parameters or fertility outcomes based on ejaculation frequency or abstinence duration. Excluded: non-human studies, case reports, and studies not reporting primary outcomes of interest
Selection process Two reviewers independently screened titles and abstracts, followed by full-text review. Disagreements were resolved by discussion to reach consensus
Any additional considerations, if applicable This narrative review synthesizes studies thematically across semen quality domains. A narrative review checklist will be submitted with the manuscript

Included studies were randomized controlled trials, cohort studies, cross-sectional studies, and reviews reporting on semen parameters or fertility outcomes based on ejaculation frequency or abstinence duration. Excluded were non-human studies, case reports, and studies not reporting primary outcomes of interest. Two reviewers independently screened titles and abstracts, followed by full-text review. Disagreements were resolved by discussion to reach consensus. Fifteen full-text studies met inclusion criteria, with additional references cited to provide contextual background.

Titles, abstracts, and full texts were independently screened by two reviewers, with discrepancies resolved by consensus. Data extracted from each study included population characteristics (e.g., fertile donors, infertile men, couples undergoing assisted reproduction), sample size, abstinence duration or ejaculation frequency, and reported outcomes. The selection process remains subject to potential bias due to subjective judgments regarding study quality and relevance.

Due to heterogeneity in study design and populations, findings were synthesized thematically rather than statistically. Results are organized across four major domains discussed in the main text: semen volume and sperm count, motility and viability, DNA fragmentation and integrity, and fertility outcomes. A comprehensive summary of representative studies and outcomes is provided in Table 2.

Table 2

Selected studies on ejaculatory frequency vs. abstinence and sperm/fertility outcomes

Study Population Abstinence durations compared Key findings Link
Carlsen et al. 2004 27 healthy men (longitudinal) ≤1 ejaculation vs. ≥2 ejaculations per week Higher frequency lowered sperm concentration but did not affect motility or morphology; stable morphology regardless of frequency https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/15302284/
Levitas et al. 2005 9,489 semen analyses (mixed fertility status) 1 vs. 2–3 vs. 4–7 days Longer abstinence increased count; motility peaked at 1–2 days and declined thereafter; morphology unchanged or slightly lower with long abstinence https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/15950636/
Gosálvez et al. 2011 21 IVF patients (cross-over) 1 vs. 4 days (same men) 1-day abstinence showed significantly lower DFI than 4-day; better sperm DNA integrity implied potential embryo quality benefit https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/21924714/
Welliver et al. 2016 20 healthy men (prospective) Daily ejaculation for 14 days Semen volume and count dropped initially but stabilized; motility and morphology remained stable; quality maintained with daily ejaculation https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/27785432/
Comar et al. 2017 2,458 semen samples (infertility clinic) 1 → 10 days (continuous variable) Count increased up to 4–5 days, then plateaued; DFI increased with longer abstinence; supports ~3–5 days as optimal https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/28985041/
Agarwal et al. 2016 119 men (prospective lab study) <2 vs. 2–7 vs. >7 days Lowest DFI with <2 days; higher DFI with longer abstinence; longer abstinence also increased oxidative stress markers https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/27196032/
Dahan et al. 2021 112 men with high DFI (cohort) 3 days vs. 3 hours (back-to-back samples) 3-hour abstinence reduced DFI significantly vs. 3 days; over half of high DFI men normalized; motility slightly improved https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7822978
Borges et al. 2019 818 IVF/ICSI cycles (prospective) ≤4 vs. >4 days (also 1, 2–4, 5–7 days) >4 days linked to lower fertilization, blastocyst, implantation, and pregnancy rates; best outcomes with 1-day abstinence https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/30570220/
Kabukçu et al. 2021 120 unexplained infertility couples (RCT) 1 vs. 3 days before IUI No difference in pregnancy rates (17.3% vs. 18.5%); DFI and motility similar between groups; 1-day abstinence was non-inferior https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/32902676/
Soltanizadeh et al. 2023 24 studies (systematic review of ART outcomes) Varied; generally <2–3 vs. >5–7 days Short abstinence improved pregnancy and live birth rates; DFI consistently lower; supports reevaluating abstinence guidelines https://pubmed-ncbi-nlm-nih-gov.proxy.cc.uic.edu/36983220/
Du et al. 2024 Meta-analysis of 85 studies Short-term vs. long-term abstinence Short-term abstinence associated with improved semen parameters and fertility outcomes in infertile men https://pubmed.ncbi.nlm.nih.gov/38197853/
Sørensen et al. 2023 Systematic review of 24 studies Short (<4 days) vs. long (>4 days) abstinence Shorter abstinence times linked to higher pregnancy and live birth rates, and improved DNA fragmentation index https://pubmed.ncbi.nlm.nih.gov/36983220/
Barbagallo et al. 2021 67 oligospermic men 2–7 days vs. 1–3 hours abstinence Second ejaculate after short abstinence showed higher sperm concentration, motility, and lower DNA fragmentation https://pubmed.ncbi.nlm.nih.gov/34978169/
Mochida et al. 2020 80 Japanese couples Varied coital frequency Higher coital frequency associated with increased probability of conception within 24 weeks https://pubmed.ncbi.nlm.nih.gov/32664373/
Agarwal et al. 2016 73 subfertile oligozoospermic men Up to 60 minutes abstinence between ejaculates Consecutive ejaculates showed improved sperm parameters: higher concentration, motility, and morphology https://pubmed.ncbi.nlm.nih.gov/26776821/

ART, assisted reproductive technology; DFI, DNA fragmentation index; ICSI, intracytoplasmic sperm injection; IUI, intrauterine insemination; IVF, in vitro fertilization; RCT, randomized controlled trial.

Results

Semen volume and sperm count

Ejaculatory abstinence is consistently associated with increased semen volume and sperm count per ejaculate. This is largely due to ongoing sperm production and storage within the seminal vesicles and epididymis. For example, one study found semen volume increased from approximately 2.3 mL after 1 day of abstinence to 3.7 mL after 7 days, with sperm counts nearly doubling (1). However, beyond approximately 7 days, these gains plateau and may reverse, likely due to storage saturation and degradation of older sperm (2). Another study identified an optimal abstinence duration of around 4 days for maximizing motile sperm yield (3).

In contrast, sperm counts have been shown to decline by the third consecutive day of daily ejaculation and then stabilize, suggesting an adaptive response by the reproductive system (6,7). While a single ejaculate after 7 days of abstinence may contain around 300 million sperm, ejaculating daily produces smaller per-ejaculate volumes (about 150 million sperm per day) (7,8). However, because this occurs consistently, the total sperm output maintained over a week exceeds one billion, demonstrating that frequent ejaculation does not deplete sperm production but rather redistributes it across multiple ejaculations.

In summary, semen retention boosts sperm quantity per ejaculate but offers diminishing returns beyond approximately 1 week (Table 2). Despite lower counts per ejaculate, daily ejaculation sustains overall sperm production and prevents aging-related damage (3).

Sperm motility and viability

Sperm motility—the ability of sperm to swim effectively—is critical for natural conception, as motile sperm must traverse the female reproductive tract to reach the egg. Unlike sperm count, motility tends to decline with longer periods of abstinence (6).

Prolonged abstinence allows sperm to accumulate and remain in the epididymal storage environment for extended periods, which exposes them to increased oxidative stress. Reactive oxygen species (ROS), generated by aging sperm and leukocytes in seminal plasma, can damage the sperm membrane, impair mitochondrial function, and cause DNA fragmentation—all of which reduce motility (9,10). In addition, membrane lipid peroxidation compromises flagellar integrity and energy efficiency, further hindering progressive movement. These changes contribute to a decline in sperm function over time, even as total sperm count increases with longer storage (11).

Conversely, shorter abstinence intervals yield ejaculates containing fresher, more viable sperm. One study evaluating back-to-back ejaculates found that the second ejaculate, collected after just a few hours, had reduced DNA fragmentation and improved motility (12). Similarly, meta-analytic data show that shorter abstinence (1 to 2 days) is associated with modest but significant increases in motility and viability, particularly among men with unexplained infertility (1).

Supporting this, Shen et al. demonstrated that spermatozoa collected after a shorter abstinence interval (1–3 hours) exhibited significantly higher expression of proteins involved in motility and capacitation compared to those collected after 3 to 7 days. Additionally, these “younger” sperm showed enhanced acrosome reaction capability, suggesting improved functional readiness for fertilization relative to their older counterparts (13,14).

In summary, sperm motility declines after several days of abstinence due to oxidative stress and aging, while short abstinence (even a few hours) favors the release of newer, more motile sperm. Frequent ejaculation reduces storage time and oxidative damage, yielding healthier sperm (Table 2)

Sperm DNA fragmentation and integrity

One of the most critical differences between semen retention and frequent ejaculation lies in sperm DNA fragmentation and overall genomic integrity. Studies consistently show that prolonged abstinence increases sperm DNA fragmentation, which is linked to lower pregnancy rates and higher miscarriage risk (14,15).

Prolonged abstinence increases sperm exposure to ROS, which accumulate once sperm exit the protective environment of the testes. This oxidative stress can damage DNA, and multiple studies have shown that DFI rises with longer abstinence durations—particularly beyond the 4 to 5 day mark, where a steeper decline in DNA quality is often observed (6,16). This supports the idea that shorter abstinence intervals help preserve genomic integrity. Further reinforcing this, asthenozoospermic men with high ROS levels have been shown to exhibit decreased mitochondrial DNA integrity and low mitochondrial membrane potential (MMP), linking oxidative stress to DNA damage (13).

Recognizing this connection, frequent ejaculation emerges as a practical strategy to reduce oxidative burden and improve sperm integrity by limiting the duration sperm remain stored in the epididymis, thereby reducing cumulative exposure to ROS. Shorter intervals ensure sperm are more recently produced and less likely to have accumulated damage. This “flush out” effect helps maintain a healthier sperm population and has been linked to lower oxidative stress markers (10,14).

In summary, semen retention tends to increase DNA fragmentation, while frequent ejaculation improves it (Table 2). For men with elevated DFI or unexplained infertility, shorter abstinence intervals may enhance fertility outcomes. Even in normospermic men, avoiding prolonged retention may support better sperm quality when trying to conceive.

Fertility outcomes

Ultimately, the central question is how ejaculation frequency affects actual fertility outcomes like pregnancy and live birth rates. While semen parameters are helpful proxies, achieving pregnancy is the true clinical endpoint. Studies have explored this in both natural conception and assisted reproductive technologies (ARTs) such as intrauterine insemination (IUI) and in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) (Table 2).

Natural conception

Fertility experts generally advise intercourse every 1 to 2 days during the fertile window (17). Research shows daily intercourse around ovulation results in similar or slightly higher pregnancy rates than every-other-day intercourse (7). Abstaining has not been shown to improve conception rates; in fact, prolonged abstinence may lead to missing the fertile window or using lower-quality sperm as mentioned above. While trials comparing abstinence intervals are limited, epidemiologic data suggest that frequent, well-timed intercourse yields at least equal, if not superior, pregnancy rates (17,18).

IUI

A randomized study by Kabukçu et al. found no difference in pregnancy rates between 1 vs. 3 days of abstinence before IUI. Even though sperm counts were slightly lower after 1 day, outcomes were equivalent. Some clinics still recommend 2 to 3 days of abstinence to ensure sample volume, but this data suggests that one day is sufficient for most men. For men with high DNA fragmentation, clearing an ejaculate the day before IUI collection may improve sperm quality (19).

IVF/ICSI

Data from IVF/ICSI is most strongly in favor of short abstinence. Borges et al. [2019] found that abstaining more than 4 days was linked to lower fertilization, blastocyst formation, implantation, and pregnancy rates. Couples who conceived had a mean abstinence closer to 3 days, and implantation rates were highest with just 1 day (16). A 2023 systematic review confirmed that shorter abstinence was consistently associated with improved ART outcomes (20).

Discussion

As summarized in Table 2 the collective evidence suggests that frequent ejaculation—defined as shorter ejaculatory abstinence—yields sperm with superior motility and DNA integrity, while prolonged abstinence increases semen volume and total count at the expense of quality (1,6,10). Importantly, the quality of evidence varies substantially across study settings, particularly between ART-based cohorts and smaller observational studies. Historically, guidance emphasized maximizing sperm quantity with 2–3 days of abstinence, which remains reasonable for semen analysis or IUI. However, beyond 5–7 days, gains in sperm count plateau, while motility and DNA quality decline. Conversely, abstinence periods of 0–1 day may slightly reduce sperm count but consistently enhance function, as evidenced by improved embryo development and implantation rates in IVF cohorts where shorter intervals improved embryo development and implantation rates (20).

For men with normal or elevated baseline sperm counts, extended abstinence offers minimal benefit and may impair quality. In oligozoospermic men, moderate abstinence (2–3 days) may balance yield and function, although some IVF centers now use second ejaculates—despite lower volume—for ICSI, given their superior DNA profiles (8). Daily intercourse during the fertile window has not been shown to negatively impact fertility and, in contrast, is associated with improved pregnancy rates compared to prolonged abstinence. Moreover, regular timed or strategic abstinence can contribute to psychological stress, which regular ejaculation may help alleviate (20). Epidemiologic evidence also supports that frequent ejaculation is linked to lower risk of prostate cancer (21).

While very frequent ejaculation (multiple times per day) remains understudied and produces variable effects depending on baseline sperm quality (4), daily or alternate-day intervals appear safe and effective for most (20). Individual variability exists—men with varicoceles or high oxidative stress (older men) may benefit more from frequent ejaculation (5,9). Despite current WHO guidelines recommending 2 to 7 days of abstinence, the body of scientific evidence suggests narrowing this window to 1 to 3 days, particularly for patients who prioritize fertility optimization (2,22).

While this review primarily focuses on male factors, fertility outcomes are inherently multifactorial. Female partner age, ovarian reserve, and overall reproductive health substantially influence the likelihood of conception and live birth and must be considered when counseling couples (23,24). Additionally, real-world barriers such as low libido, erectile dysfunction, and performance anxiety may limit the feasibility of frequent ejaculation for some men (25). Nonetheless, when feasible, ejaculation every 1 to 2 days represents a simple, non-invasive strategy that is supported by available evidence to improve sperm quality and potentially enhance fertility outcomes (22).

Future research should aim to define optimal ejaculation frequency across different infertility profiles. Large, well-designed trials evaluating fertilization, embryo quality, and live birth outcomes will be essential to refine clinical recommendations. Integration of advanced sperm testing may further help identify subgroups most likely to benefit from tailored ejaculatory strategies.

Conclusions

In the context of male fertility, frequent ejaculation—defined as shorter abstinence intervals—is generally more beneficial than prolonged semen retention. Although abstinence increases semen volume and total sperm count, it is also associated with older, less motile sperm and greater DNA fragmentation. In contrast, regular ejaculation promotes sperm with improved motility, viability, and genomic integrity.

For couples attempting conception, the available evidence supports avoiding prolonged abstinence. Ejaculation every 1 to 3 days, or daily during the fertile window, helps maintain sperm quality and may improve fertility outcomes, particularly in men with elevated sperm DNA fragmentation.

While individualized counseling remains important—especially for men with severe oligospermia—routine abstinence beyond 3 to 5 days appears unnecessary and may be counterproductive. Notably, current evidence does not support claims that semen retention enhances fertility. However, the literature encompasses a broad range of study designs, including small observational cohorts and large retrospective analyses, with relatively few randomized trials. Outcomes vary from laboratory semen parameters to clinically meaningful endpoints such as fertilization, pregnancy, and live birth, and this heterogeneity, together with the predominantly observational nature of the data, limits the strength of definitive conclusions.

In summary, shorter abstinence intervals are associated with improved sperm function and, in many cases, better pregnancy and live birth outcomes. Although recommendations should be made with appropriate caution given the limitations of the existing evidence base, encouraging regular ejaculation remains a simple, evidence-aligned strategy to support male reproductive health.

Acknowledgments

None.

Footnote

Reporting Checklist: The authors have completed the Narrative Review reporting checklist. Available at https://tau.amegroups.com/article/view/10.21037/tau-2025-aw-847/rc

Peer Review File: Available at https://tau.amegroups.com/article/view/10.21037/tau-2025-aw-847/prf

Funding: None.

Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://tau.amegroups.com/article/view/10.21037/tau-2025-aw-847/coif). The authors have no conflicts of interest to declare.

Ethical Statement: The authors are accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.

Open Access Statement: This is an Open Access article distributed in accordance with the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License (CC BY-NC-ND 4.0), which permits the non-commercial replication and distribution of the article with the strict proviso that no changes or edits are made and the original work is properly cited (including links to both the formal publication through the relevant DOI and the license). See: https://creativecommons.org/licenses/by-nc-nd/4.0/.

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Cite this article as: Clay N, Zleczewski M, Stroie F. Ejaculatory frequency and male fertility: a literature review of evidence-based recommendations. Transl Androl Urol 2026;15(2):63. doi: 10.21037/tau-2025-aw-847

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