Squirting and female ejaculation are two distinct phenomena that researchers now recognize as separate events, though popular culture treats them as one. Squirting involves the expulsion of a relatively large volume of dilute fluid from the bladder during sexual arousal or orgasm, while female ejaculation proper is a much smaller secretion from glands surrounding the urethra. The confusion between them has muddied both scientific research and public understanding for decades, and only in the last ten to fifteen years has imaging and biochemical analysis started to untangle what is actually happening.
Two Fluids, Two Sources
The single most important thing to understand is that squirting and female ejaculation produce chemically different fluids from different anatomical structures. Female ejaculation involves a small amount of thick, whitish fluid secreted by the Skene’s glands (also called the female prostate) during orgasm. This fluid contains prostate-specific antigen, the same marker associated with the male prostate, and its volume is typically just a few milliliters.1PubMed. Differential diagnostics of female “sexual” fluids: a narrative review Squirting, by contrast, involves a much larger volume, often ten milliliters or more, of transparent fluid that originates from the urinary bladder. Biochemically, this fluid resembles very dilute urine, with measurable urea, creatinine, and uric acid, though it frequently contains a small contribution of prostatic secretions as well.2Clinical Anatomy. Female ejaculation and squirting as similar but completely different phenomena: A narrative review of current research
A detailed case study of one woman who experienced both types of fluid emission during a single session confirmed this split. The larger, watery expulsion had the density and chemical profile of diluted urine, while the smaller, thicker secretion showed prostate-specific antigen levels comparable to components of male semen.3The Journal of Sexual Medicine. New Insights from One Case of Female Ejaculation Both fluids can be released in the same sexual encounter, which is part of why they have been lumped together for so long. But they are produced by different organs, contain different substances, and appear to be triggered by overlapping but not identical mechanisms.
What the Ultrasound Studies Show
The strongest evidence for squirting’s bladder origin comes from imaging studies that tracked what happened inside women’s bodies in real time. In a study of seven women who reported regular squirting, pelvic ultrasounds were performed at three points: after the women had urinated and their bladders were confirmed empty, during sexual stimulation just before squirting occurred, and immediately afterward. In every case, the bladder had noticeably refilled during arousal, and after squirting, the bladder was empty again.4The Journal of Sexual Medicine. Nature and Origin of “Squirting” in Female Sexuality Biochemical analysis of the expelled fluid in that same study showed urea, creatinine, and uric acid concentrations similar to urine, with prostate-specific antigen detected in some samples. A systematic review incorporating four imaging studies confirmed this pattern of bladder filling during arousal followed by complete emptying at the moment of squirting.5The Journal of Sexual Medicine. Female Ejaculation, Squirting, and Coital Incontinence: A Systematic Review and Meta-Analysis of Biochemical, Imaging, and Urodynamic Diagnostic Criteria
The speed at which the bladder refills is unusual. During normal hydration, bladder filling takes time. During sexual arousal, however, women in these studies went from verified empty bladders to noticeable filling within minutes. Researchers have not fully explained why the kidneys appear to produce urine at an accelerated rate during arousal, or whether local vascular changes in the pelvic region contribute to rapid bladder filling. This remains one of the genuinely open questions in the field.
The Anatomy Behind It
The Skene’s glands, which produce female ejaculatory fluid, sit on either side of the urethra. They are small, variable in size from person to person, and have been demonstrated through immunohistochemical staining to be homologous to the male prostate. In a study of tissue from 19 patients ranging from newborns to 86-year-olds, paraurethral glands were found in 18 cases, and the majority stained positive for prostate-specific antigen and prostatic acid phosphatase, the same markers found in male prostate tissue.6PubMed. Homology between the female paraurethral (Skene’s) glands and the prostate. Immunohistochemical demonstration This homology is not unique to humans; it has been observed across mammalian species, with the glands consistently composed of tubuloalveolar structures lined by similar cell types and surrounded by smooth muscle fibers.7PubMed. Morphological characterization of the female prostate (Skene’s gland or paraurethral gland) of Lagostomus maximus maximus
The size and development of these glands varies considerably among women, which may partly explain why some women experience noticeable ejaculatory fluid and others do not. This variability has been a thorn in the side of researchers trying to make universal claims. A woman with larger, more developed Skene’s glands could potentially produce enough prostatic secretion to be physically noticeable during orgasm, while someone with smaller glands might produce trace amounts that go undetected.
The broader region involved in both squirting and ejaculation is sometimes described as the clitourethrovaginal complex, a term for the intertwined area where the clitoris, urethra, and anterior vaginal wall converge. Imaging studies have shown that in this zone, the three structures are so closely merged that it can be difficult to distinguish them as separate entities.8PubMed Central. G-spot: Fact or Fiction?: A Systematic Review Stimulation of the anterior vaginal wall does not target a single discrete structure. Rather, it affects a composite region that includes the internal clitoris, the urethra, the Skene’s glands, and a dense network of nerves. Cadaver studies have confirmed that autonomic and somatic nerve fibers are distributed throughout the periurethral tissue and anterior vaginal wall without sharp boundaries between zones.9PubMed. Somatic and autonomic nerve density of the urethra, periurethral tissue, and anterior vaginal wall: an immunohistochemical study in adult female cadavers
Squirting Versus Incontinence
If squirting fluid comes largely from the bladder and resembles dilute urine, a fair question is whether it is just urinary incontinence. The distinction matters to researchers and to the women who experience it. Coital incontinence, the involuntary loss of urine during sex, is a recognized urological condition that is typically associated with pelvic floor dysfunction and occurs in a pattern unrelated to arousal or orgasm. Women with stress incontinence may leak urine during penetration due to pressure on the bladder, while women with urge incontinence may leak during orgasm due to detrusor muscle contractions.
A systematic review that attempted to draw lines between female ejaculation, squirting, and coital incontinence found that the boundaries are blurry, particularly because all three can involve fluid exiting the urethra during sex. However, the review noted that female ejaculation had been objectively documented in only a small number of cases, while its self-reported prevalence is much higher, suggesting that many women who report “ejaculating” may actually be experiencing squirting or some combination of the two phenomena.10The Journal of Sexual Medicine. Female Ejaculation Orgasm vs. Coital Incontinence: A Systematic Review The practical difference, to the extent one exists, seems to involve the subjective experience: women who squirt typically describe it as pleasurable and linked to high arousal, while women with coital incontinence often describe it as distressing and unrelated to the quality of the sexual experience.
How Common Is It
Prevalence estimates vary widely depending on how squirting is defined and whether it is self-reported or observed in a lab. A U.S. probability sample of adult women found that about 40% had experienced squirting at least once in their lifetime, with a median frequency of three to five times total.11PubMed. Vaginal Squirting: Experiences, Discoveries, and Strategies in a U.S. Probability Sample of Women Ages 18-93 A systematic review that pooled data across multiple studies found estimates ranging from 10% to 54%, reflecting different sample compositions and different definitions of what counts as squirting.12The Journal of Sexual Medicine. Vaginal Squirting: Origin, Experiences and Discoveries: A Systematic Review
The gap between the lowest and highest estimates tells you something about the state of the research. These numbers come almost entirely from self-report questionnaires. Women’s interpretations of what squirting means, how much fluid counts, and whether to report experiences they found confusing all shape the data. Some women may not report squirting because they interpreted it as urinary leakage and felt embarrassed. Others may report it more readily because they associate it with sexual confidence. Until more studies combine self-report with objective measurement, the true prevalence will remain fuzzy.
The Emotional and Psychological Side
Squirting carries an outsized emotional weight compared to most physiological events. Qualitative research with young women who experience it has documented a wide range of reactions: embarrassment and fear of a partner’s reaction when it first happens, confusion about whether something is wrong, and, for many, eventual feelings of calm and relaxation once they understand what is occurring.13The Journal of Sexual Medicine. Experiences of young women in the practice of squirting: a descriptive qualitative study Some women in that study reported that stereotypes and social perceptions about their bodies and about squirting caused real psychological harm, particularly when they felt pressure to either produce it on command or to suppress it.
A case-control study comparing women who squirt with those who do not found that the squirting group scored higher on measures of overall sexual function, including desire, arousal, and lubrication, and also scored higher on orgasm intensity and sexual self-esteem. They also showed more positive body image and lower discomfort with emotional closeness.14The Journal of Sexual Medicine. The squirt game. Psychosexual characteristics of women experiencing squirting: insights from a case–control study The researchers noted that these associations do not prove squirting causes better sexual function; it may be that women who are more comfortable with their bodies and more sexually responsive are simply more likely to experience and report squirting. The causal arrow is unclear, and the finding deserves that caveat.
Pornography has amplified the cultural visibility of squirting in ways that cut both directions. On one hand, wider visibility has helped normalize the experience for women who were previously convinced something was wrong with them. On the other, the dramatized version of squirting in pornography has created unrealistic expectations, both for women who feel pressure to perform it and for partners who interpret its absence as a personal failure. The gap between what happens in a lab study and what appears on a screen is vast.
A Shared Neural Mechanism With Urination
One neurological finding helps explain why squirting feels different from simple incontinence even though the fluid comes from the same organ. Brain imaging research has identified a region in the brainstem called the pelvic organ-stimulating center that is activated during both ejaculation in men and orgasm in women. This same region is also activated during urination, but on the opposite side of the brainstem. The pelvic floor contractions that accompany orgasm are driven by a separate brainstem area that projects directly to the pelvic floor muscles.15The Journal of Sexual Medicine. Pontine Control of Ejaculation and Female Orgasm In other words, the brain circuitry for bladder emptying and the circuitry for orgasm are neighbors that share infrastructure. That anatomical closeness may explain how sexual arousal can trigger rapid bladder filling and expulsion through pathways that overlap with but are not identical to normal urination.
Centuries of Documentation, Decades of Debate
The scientific confusion around squirting and female ejaculation is not for lack of historical awareness. Descriptions of fluid emission during female sexual arousal appear in Chinese Taoist texts from the 4th century, in Indian writings associated with the Kāmaśāstra tradition, and in Western sources going back to Aristotle around 300 B.C. The Dutch physician Reinier de Graaf provided the first scientific description of female ejaculation in the 17th century and was the first to call the periurethral glands the “female prostate,” a term that persisted for centuries until Ernst Gräfenberg’s 1952 paper on the role of the urethra in female orgasm brought renewed attention to the topic.16PubMed. The history of female ejaculation
Despite that long record, the modern scientific consensus is still incomplete. A review of the history and anatomy of female ejaculation published in 2020 concluded that views on the subject remain “controversial and inconsistent, with no clear conclusion as to its function.”17PubMed. Female ejaculation: An update on anatomy, history, and controversies The persistence of that uncertainty across hundreds of years and dozens of studies reflects both the genuine complexity of pelvic anatomy and a historical reluctance to fund and pursue research on female sexual physiology with the same rigor applied to male sexuality.
Why Would the Female Prostate Exist at All
The Skene’s glands present an evolutionary puzzle. The male prostate produces fluid that nourishes and protects sperm, an obvious reproductive function. The female version has no such straightforward role, which has led some researchers to suggest it is simply a developmental remnant, left over from the embryonic stage when male and female anatomy have not yet diverged.18PubMed. Female prostate: historical, developmental, and morphological perspectives
Others have proposed active functions. One hypothesis suggests that female ejaculatory secretions serve an antimicrobial role, flushing compounds such as zinc into the urethra to protect against urinary tract infections, particularly those triggered by intercourse. The logic is that women who could clear bacteria from the urethra more effectively were healthier, more receptive to frequent intercourse, and therefore more likely to reproduce.19PubMed. Does female ejaculation serve an antimicrobial purpose? A more recent hypothesis proposes that ejaculatory fluids help raise vaginal pH from its naturally acidic state toward the neutral range where sperm survive best, potentially improving fertilization odds.20Medical Hypotheses. Female ejaculation enhances reproductive success
Both ideas remain speculative. They are published as formal hypotheses, not confirmed findings, and neither has been tested in a controlled experiment. It is entirely possible that the female prostate persists simply because there is no evolutionary pressure strong enough to eliminate it, much as men retain non-functional nipples. The honest state of knowledge is that no one has proven a function for female ejaculation, and the evolutionary conversation is still at the “interesting idea” stage.
Why This Research Is So Thin
If you are struck by how small the sample sizes are in these studies, you are not wrong. The landmark ultrasound study involved seven women. The case study distinguishing two fluids involved one. The broader survey data is more robust, but surveys cannot tell you what is biochemically happening inside someone’s body. Several factors explain this gap. Funding agencies have historically been reluctant to support research on female sexual pleasure. Recruiting participants for studies that involve sexual arousal and imaging in a clinical setting is understandably difficult. And the stigma around the topic discourages many women from reporting their experiences even in anonymous surveys, let alone volunteering for lab observation.
The result is a field where the basic physiological picture is starting to come into focus, but the fine details remain blurry. Questions like whether all women’s bladders refill rapidly during arousal or only some, whether pelvic floor muscle tone influences squirting, and whether hormonal status plays a role are still largely unanswered. Larger studies with standardized protocols are needed, and those studies will require both funding and a cultural willingness to treat female sexual physiology as a legitimate scientific subject.