The gonadal artery is a paired blood vessel that runs from the abdominal aorta down to the reproductive organs, supplying the testes in males and the ovaries in females. In roughly 99% of people, each gonadal artery branches off the aorta near the level of the second lumbar vertebra, making it one of the longest and narrowest arteries in the body relative to its origin point. Despite its slender profile, this vessel does far more than deliver blood. It participates in temperature regulation, hormone signaling, and becomes a serious concern during several types of surgery.
Where It Comes From and Where It Goes
The gonadal arteries typically arise as a pair from the front of the abdominal aorta, just below the renal arteries. A large systematic review and meta-analysis found that this standard anatomy, a single artery on each side branching from the aorta, holds in about 98.7% of cases.1PubMed Central. Prevalence of variants in gonadal vessels: a systematic review with meta-analysis From the aorta, each artery takes a long, oblique path downward through the retroperitoneum, the space behind the abdominal cavity’s lining. Along the way it crosses over the ureter and the psoas muscle before reaching its destination organ.
In males, the vessel is called the testicular artery. It passes through the inguinal canal as part of the spermatic cord and enters the scrotum. In females, it is called the ovarian artery and follows a shorter path into the pelvis, traveling through the suspensory ligament of the ovary to reach the ovarian tissue. Though they share a common origin and the umbrella name “gonadal artery,” the two versions behave quite differently once they arrive at their target organs.
What the Testicular Artery Actually Does
Delivering oxygenated blood to the testis sounds straightforward, but the route the testicular artery takes is surprisingly elaborate. In about 85% of men, the artery descends in a relatively straight line through the spermatic cord, while in the remaining 15% it follows a noticeably coiled or convoluted path.2PubMed. Human testicular arterial supply: gross anatomy, corrosion cast, and radiologic study That coiling is not random. It is part of a heat-exchange system that keeps the testes cooler than core body temperature, a requirement for healthy sperm production.
The mechanism works because the coiled artery is physically wrapped within a network of small veins called the pampiniform plexus. Warm arterial blood flowing toward the testis loses heat to the cooler venous blood returning from it, and the venous blood warms by a corresponding amount. Research in rams demonstrated that most of the cooling happens in this coiled segment of the spermatic cord and described the arrangement as a remarkably efficient countercurrent heat exchanger.3Journal of Reproduction and Fertility. Relation of Vascular Heat Exchange to Temperature Regulation in the Testis of the Ram The same principle operates in humans, though the temperature differential is smaller given the scrotal position of the testes.
Once the testicular artery reaches the testis itself, it usually terminates by splitting into upper and lower polar branches. That pattern appears in roughly 70% of men. The testis is not entirely dependent on this single artery, though. Two backup vessels, the cremasteric artery and the artery of the vas deferens, both reach the testis from different origins and form connections with branches of the testicular artery near the surface of the organ.4PubMed. Human testicular arterial supply: gross anatomy, corrosion cast, and radiologic study These collateral pathways become critical during surgery, because they can sometimes sustain the testis even if the main artery is compromised.
The Ovarian Artery and Hormone Shuttling
In females, the ovarian artery supplies the ovary and also sends branches to the fallopian tube and the side of the uterus. Like the testicular artery, the ovarian artery tends to become highly tortuous as it approaches the ovary, especially in women who have been pregnant. That tortuosity is so characteristic that radiologists use it to identify the vessel on imaging. In one study of women undergoing angiography for uterine fibroid embolization, every ovarian artery that was identified originated from the aorta below the renal arteries and displayed a distinctively winding course.5PubMed. Ovarian artery: angiographic appearance, embolization and relevance to uterine fibroid embolization
Beyond delivering oxygen, the gonadal vessels participate in an elegant hormonal recycling system. In cattle, and likely to some degree in humans, hormones secreted by the ovary into the ovarian vein can transfer directly across into the ovarian artery through countercurrent exchange. One study showed that when radioactively labeled testosterone was infused into the ovarian vein near the ovary, roughly 5% of it appeared in the ovarian arterial blood without ever passing through the general circulation.6Biology of Reproduction. Countercurrent Transfer of Testosterone by the Ovarian Vascular Pedicle of the Cow: Evidence for a Relationship to Follicular Steroidogenesis This local transfer concentrates hormones right where they are needed, feeding testosterone back to developing follicles, which convert it into estrogen. The same countercurrent principle applies to other steroids, peptide hormones, and even gases, opening the door to localized drug delivery through the gonadal vasculature.7Reproduction. Counter-current transfer in reproductive biology
Anatomical Variations and Why Surgeons Care About Them
While the standard origin from the aorta holds in nearly 99% of people, the remaining cases present a range of anomalies that can catch surgeons off guard. A study of 180 gonadal arteries in human fetuses found that about 9% had variant origins, with the variations more common in males than females and on the right side more than the left.8PubMed. Origins of the gonadal artery: embryologic implications The most clinically important variant is a gonadal artery that arises from the renal artery rather than the aorta. This happens because during fetal development, the gonads start near the kidneys and gradually descend. Their blood supply is supposed to shift from early mesonephric vessels to a definitive aortic origin, but sometimes that transition does not complete cleanly, and the artery retains its connection to the renal vessels.
Some individuals have gonadal arteries that originate from an unusually high point on the aorta, sometimes alongside accessory renal arteries.9Annals of Anatomy – Anatomischer Anzeiger. High origin of gonadal arteries associated with other variations Others have duplicated gonadal arteries on one or both sides. These variants are harmless in everyday life but become genuinely dangerous during retroperitoneal surgery. When a gonadal artery branches off the renal artery and that renal artery is being clamped or the kidney is being removed, the gonad may lose its blood supply without anyone realizing it. One cadaveric study specifically urged standardized preoperative imaging before living kidney donation to catch these anomalies and reduce the risk of accidental gonadal ischemia.10International Journal of Medical Students. A Cadaveric Study on the Anomalous Origin of Renal and Gonadal Vasculature: An Observational Study A separate anatomical analysis reinforced the point: when the gonadal artery comes from the renal artery and no backup aortic vessel exists, partial or total nephrectomy risks compromising the gonadal blood supply entirely.11PubMed. The morphology and the surgical importance of the gonadal arteries originating from the renal artery
Varicocele Surgery and the Artery Preservation Debate
A varicocele is an enlargement of veins within the spermatic cord and is one of the most common treatable causes of male infertility. The standard surgical fix, varicocelectomy, involves tying off or removing the dilated veins. The question that has divided urologists for years is whether it matters if you accidentally ligate the testicular artery in the process.
An older randomized trial compared artery-preserving varicocelectomy with artery-ligating varicocelectomy and found no significant difference. Both groups improved in sperm density and total sperm count, and pregnancy rates were statistically similar at about 38% versus 24%.12PubMed. Should the testicular artery be preserved at varicocelectomy? The reasoning was that those collateral arteries, the cremasteric artery and the artery of the vas, could pick up the slack. For men with normal or mildly reduced sperm counts, that conclusion holds up reasonably well.
The picture changes for men with severely low sperm counts. A more recent randomized controlled study focused specifically on men with severe oligozoospermia found that artery-preserving varicocelectomy led to better semen quality and higher natural pregnancy rates than the artery-ligating approach.13PubMed. The role of artery-preserving varicocelectomy in subfertile men with severe oligozoospermia: a randomized controlled study The likely explanation is that when the testis is already struggling, even partial reduction in blood flow from losing the main artery can tip the balance. The collateral circulation is adequate in a healthy testis but may not be sufficient in one that is already compromised. Current thinking leans toward preserving the artery whenever feasible, particularly in men whose fertility parameters are already poor.
Gonadal Artery Aneurysms
An aneurysm of the gonadal artery is exceedingly rare. Fewer than 30 cases were reported over a 20-year span, and most of those involved the ovarian artery in women who were pregnant or in the peripartum period.14PubMed Central. Spontaneous Rupture of a Right Gonadal Artery Aneurysm: A Case Report Bilateral gonadal artery aneurysms are so unusual that only a single case has been documented. Despite their rarity, these aneurysms are dangerous because they tend to present only when they rupture, causing sudden abdominal or flank pain and a retroperitoneal bleed.
A comprehensive review of ovarian and uterine artery aneurysms found that about 91% of patients presented with abdominal or back pain, and rupture with retroperitoneal hemorrhage occurred in roughly 73% of cases.15PubMed. True Aneurysm of Ovarian and Uterine Arteries: a Comprehensive Review The good news is that endovascular treatment, threading a catheter to the bleeding site and blocking the vessel with an embolic agent, works well. In that same review, about 87% of patients treated endovascularly achieved complete exclusion of the aneurysm. One case report described an 80-year-old woman who ruptured a left ovarian artery aneurysm, was embolized in the angiography suite, and went home two days later.16PubMed. Successful Embolization of a Ruptured Ovarian Artery Aneurysm in a Postmenopausal Woman: Case Report and Literature Review of Gonadal Artery Aneurysms For testicular artery aneurysms, the clinical picture differs slightly: they more often present with pain and acute clot formation rather than frank rupture.
Risks During Aortic Repair
Endovascular aortic aneurysm repair (EVAR) involves placing a stent graft inside the aorta to exclude a bulging aneurysm. Because the gonadal arteries branch off the aorta, deploying that graft can inadvertently cover a gonadal artery origin. In most men, the collateral supply from the cremasteric artery and the artery of the vas compensates. But if those collaterals are weak or absent, the result can be testicular ischemia or outright infarction.
Testicular infarction after EVAR is rare enough that by the time a seventh case was reported, it was still considered worthy of a standalone publication.17Journal of Vascular and Interventional Radiology. Testicular Infarction after Endovascular Aneurysm Repair In that case, the testicular artery was the only vessel supplying the right testis, making routine graft deployment a one-way ticket to infarction. Another report described a delayed presentation in which a patient developed testicular pain a week after EVAR; imaging confirmed ischemia, and the testicle was found to be infarcted at a six-month follow-up.18EJVES Short Reports. Acute Global Testicular Infarction Post-EVAR from Cholesterol Embolisation can be Mistaken for Torsion The clinical challenge is that post-EVAR testicular pain looks a lot like testicular torsion, a completely different emergency. Vascular surgeons who are aware of this complication can flag high-risk patients through preoperative imaging, potentially modifying the surgical approach or at least warning the patient.
The Ovarian Artery’s Role in Fibroid Treatment
Uterine fibroid embolization (UFE) is a minimally invasive procedure in which tiny particles are injected into the uterine arteries to starve fibroids of blood. It works well when the uterine arteries are the sole supply to the fibroids, but in some women the ovarian artery also contributes. In one angiographic study of 59 women undergoing UFE evaluation, 75 ovarian arteries were visualized, some bilateral and some unilateral. Fifteen of those women had at least one enlarged ovarian artery feeding the fibroids directly.19PubMed. Ovarian artery: angiographic appearance, embolization and relevance to uterine fibroid embolization
When an ovarian artery is feeding a fibroid and gets missed during embolization, the procedure can fail because the fibroid continues to receive blood through the back door. On the other hand, embolizing the ovarian artery comes with its own risk: disrupting blood flow to the ovary can affect ovarian function and hormonal output. The balance of risks and benefits depends on the woman’s age, desire for future fertility, and how much the ovarian artery is contributing to the fibroid supply. This is one of the clinical scenarios where preoperative angiography or cross-sectional imaging that identifies the ovarian artery’s course genuinely changes the surgical plan.
Imaging the Gonadal Artery
Color Doppler ultrasound can visualize the testicular artery in two locations: where it coils through the spermatic cord and where it runs along the edge of the testis near the epididymis. Velocity measurements tend to be higher at the cord level than along the testicular surface, reflecting the change in vessel caliber and the dampening effect of the countercurrent plexus. Reference values for blood flow in healthy stallion testes have been established and are used clinically to detect testicular pathology in veterinary medicine, and the same Doppler principles apply in human urology for evaluating conditions like torsion, tumor vascularity, and post-surgical perfusion.
CT angiography and MR angiography are the go-to tools for mapping the gonadal artery’s origin before retroperitoneal or aortic surgery. These modalities can reveal variant anatomy, duplicated vessels, or an artery arising from the renal pedicle, all information that would be invisible during surgery until something goes wrong. The push for routine preoperative vascular mapping before kidney donation reflects a growing recognition that a rare anatomical surprise during a donor nephrectomy is one of the few ways a completely healthy person can be harmed by elective surgery.20International Journal of Medical Students. A Cadaveric Study on the Anomalous Origin of Renal and Gonadal Vasculature: An Observational Study
When Countercurrent Exchange Meets Drug Delivery
The countercurrent transfer that naturally recycles hormones between gonadal veins and arteries has prompted researchers to ask whether drugs could exploit the same pathway. If a medication is applied locally near the ovary or testis, some of it could theoretically enter the venous drainage and then transfer into the arterial supply via countercurrent diffusion, achieving a high local concentration without flooding the rest of the body with the drug. Early work in animal models confirmed that this transfer is not limited to steroids; gases and peptide hormones also cross from venous to arterial blood in the gonadal pedicle.21Reproduction. Counter-current transfer in reproductive biology Translating this into a practical human therapy remains speculative, but the vascular anatomy already does something no artificial delivery system has replicated: it keeps the reproductive organs bathed in their own hormonal output at concentrations far higher than what circulates systemically.