The fluid some people release during orgasm is not simply urine, though it can contain some of the same chemical components found in urine. This is one of the most common questions in sexual health, and the answer depends on which type of fluid you’re talking about, because there are actually two distinct phenomena happening during sexual arousal and orgasm.
Two Different Fluids, Two Different Sources
What many people lump together as “orgasm fluid” is actually two separate things: female ejaculation and squirting. They feel different, look different, and come from different places in the body.
Female ejaculation is a small amount of thick, milky, white or gray fluid, typically just a few milliliters. It comes from the Skene’s glands, two small ducts that sit on either side of the urethra. These glands are sometimes called the “female prostate” because the fluid they produce contains some of the same proteins found in semen, including prostate-specific antigen (PSA). This fluid is clearly not urine. It’s a glandular secretion triggered by arousal and orgasm.
Squirting is different. It involves a larger volume of transparent fluid, roughly 10 milliliters or more, expelled through the urethra. This is the one that gets confused with peeing, and the chemistry is part of the reason why.
What’s Actually in Squirting Fluid
A well-known study published in the Journal of Sexual Medicine analyzed the fluid from women who squirt by comparing three samples: urine collected before arousal, the squirting fluid itself, and urine collected after orgasm. The concentrations of urea, creatinine, and uric acid (all markers found in urine) were comparable across all three samples. That’s the part that makes it look like urine.
But here’s where it gets more interesting. In five out of seven participants, the squirting fluid also contained PSA, the same protein produced by the Skene’s glands. That protein was absent from the urine collected before arousal. So the fluid passes through the bladder and urethra, picks up urine-like compounds along the way, but also contains glandular secretions that urine does not. Researchers describe it as diluted, chemically altered urine mixed with prostatic secretions.
In short: squirting fluid comes from the bladder, shares chemical markers with urine, but is not identical to urine. It’s a modified fluid that involves contributions from both the bladder and the Skene’s glands.
Why Your Bladder Fills During Arousal
One reason squirting feels confusing is that the bladder rapidly fills during sexual arousal, even if you emptied it right before. Ultrasound imaging in that same study confirmed that women’s bladders were empty before stimulation began, noticeably full just before squirting occurred, and then empty again immediately afterward. This rapid filling doesn’t follow the normal pace of kidney function, which suggests the body may be producing and routing fluid differently during intense arousal. The sensation of needing to urinate right before orgasm likely reflects this sudden bladder filling, not a loss of bladder control.
Squirting vs. Urinary Incontinence
There is a separate condition called coital incontinence, which is an involuntary loss of urine during sex. It comes in two forms: one triggered by penetration and one triggered by orgasm. Penetration incontinence is more common and is typically caused by stress urinary incontinence, where physical pressure on the bladder causes leakage. Orgasmic incontinence involves involuntary bladder contractions during climax.
The key distinction is that coital incontinence is a medical condition involving a urethral disorder or overactive bladder. Squirting and female ejaculation are normal physiological responses to sexual stimulation. A systematic review of the research concluded that these are completely different phenomena: female ejaculation and squirting are parts of healthy sexual function, while coital incontinence is a treatable condition. If fluid release during sex is accompanied by other symptoms of incontinence (leaking when you cough, sneeze, or exercise), that points toward a bladder issue rather than normal ejaculation or squirting.
How Common This Is
Squirting and ejaculation are far more common than most people assume. A Swedish cross-sectional study of 1,250 women found that 58% had experienced ejaculation or squirting at least once, while 6% were unsure whether it had happened. The experience was reported significantly more often among non-heterosexual women. Squirting can also happen during arousal without orgasm, which further separates it from the idea that it’s simply a loss of bladder control at climax.
The Bottom Line on What It Is
Female ejaculation, the thicker white fluid, is a glandular secretion that is definitively not urine. Squirting, the larger clear fluid, originates from the bladder and shares some chemical properties with urine, but also contains prostatic proteins that urine does not. Calling it “just pee” oversimplifies the biology. Calling it “definitely not pee” ignores the chemistry. The most accurate description is that squirting fluid is a unique blend: mostly water and diluted urinary compounds, with added secretions from the Skene’s glands, produced under conditions that don’t occur outside of sexual arousal.