Testicular Size and Consistency After Ejaculation
Yes, it is completely normal for the testes to feel smaller and softer the day after ejaculation. This temporary change reflects the physiological depletion of stored spermatozoa and seminal fluid from the epididymis and vas deferens, which normally provide bulk and firmness to the scrotal contents.
Why This Happens
The cauda epididymidis (tail portion) serves as the primary storage reservoir for mature spermatozoa, and during ejaculation the vas deferens contracts to expel the bulk of stored sperm, which accounts for the majority of the ejaculate volume. 1
After ejaculation, the cauda epididymidis is temporarily depleted of its stored sperm reserve, resulting in a reduced diameter and apparent length of both the cauda and vas deferens. 1
The testis itself does not significantly change in size acutely, but the surrounding epididymal structures that contribute to overall scrotal fullness are temporarily contracted and emptied. 1
Sperm production by the testis is continuous, but the epididymis requires time to refill its storage capacity—typically 24–72 hours—which explains why the "mushy" or softer feeling persists into the next day. 1
What Is Actually Normal
Testicular volume in adult men typically ranges from 15–25 mL per testis (measured by orchidometer or ultrasound), with volumes ≥12 mL considered normal. 2
The perceived change in size and firmness you describe is not true testicular atrophy but rather temporary depletion of the epididymal sperm reservoir and associated fluid. 1
True testicular atrophy—defined as volume persistently <12 mL—is associated with elevated FSH (>7.6 IU/L), impaired spermatogenesis, and often a history of cryptorchidism, mumps orchitis, trauma, or systemic disease. 3, 2, 4
When to Be Concerned
You should seek medical evaluation if you notice:
Persistent small testicular size (not just transiently after ejaculation) that does not return to baseline within 2–3 days. 3
Testicular pain, swelling, or a palpable mass, which could indicate torsion, infection, or malignancy. 3
Progressive shrinkage over weeks to months, which may signal primary testicular failure, hormonal dysfunction, or exposure to gonadotoxic medications (e.g., anabolic steroids, opioids, chemotherapy). 3, 5, 4
Infertility concerns or symptoms of hypogonadism (low libido, erectile dysfunction, fatigue), which warrant hormonal evaluation (FSH, LH, testosterone). 3, 5
Common Pitfalls to Avoid
Do not confuse the temporary post-ejaculatory softness with pathological testicular atrophy; the former resolves within 1–3 days as the epididymis refills. 1
Avoid self-diagnosing testicular atrophy based solely on subjective palpation immediately after ejaculation, as this is the time when the scrotum is physiologically most depleted. 1
If you have concerns about baseline testicular size, measure with a Prader orchidometer or obtain a scrotal ultrasound to quantify volume objectively—volumes ≥12 mL are reassuring. 3, 2