The Chinese people's commitment to carrying on the family line is unimaginable to men in other countries. The concept of "no heir" burdens many men with immense pain and helplessness. With advances in technology, men suffering from azoospermia can often successfully have their own children through treatments like vasectomy reversal or in vitro fertilization.
What are the treatment options for azoospermia?
Azoospermia, as the name suggests, refers to the absence of sperm detected in semen samples after multiple examinations. It is categorized into obstructive and non-obstructive azoospermia.Obstructive azoospermia occurs when the testes produce normal sperm, but the transport pathways—such as the epididymis, vas deferens, or ejaculatory ducts—become blocked. This obstruction traps healthy sperm within the testes, epididymis, or vas deferens, preventing their passage out of the body.Causes of obstructive azoospermia are numerous. Primary causes include congenital anomalies such as absence of the vas deferens, absence of the seminal vesicles, congenital obstruction of the ejaculatory ducts, or Müllerian cyst. Patients with these conditions are classified as having primary azoospermia.Secondary azoospermia arises from inflammatory conditions, tumors, or trauma. These patients previously had sperm production, which gradually diminished until complete absence.Non-obstructive azoospermia, however, stems from testicular spermatogenic dysfunction. This condition arises from congenital gonadal hypoplasia, chromosomal abnormalities, or idiopathic causes that halt sperm production. Examples include testicular hypoplasia and bilateral testicular atrophy. This category accounts for approximately 60% of azoospermia cases and 10% of male infertility cases.For these patients, there are currently no particularly effective treatments, as most bodies struggle to produce normal sperm. The primary approach involves using donor sperm from sperm banks for assisted reproductive technologies or adoption.Recent research has revealed that among these patients, testicular microsurgical sperm extraction (TMSE) may identify focal areas of spermatogenesis within the testes. If viable sperm is located, in vitro fertilization (IVF) offers a potential path to parenthood, with successful cases reported internationally.
Conventional Treatment for Obstructive Azoospermia
Treating vas deferens and epididymal blockages: Most cases of obstructive azoospermia can be cured through microsurgical procedures. Vas deferens blockages can be addressed with vasovasostomy, while epididymal blockages may require vasoepididymostomy.However, prior to vasectomy reversal (VE), patients should undergo vas deferens imaging to confirm patency. This imaging must be performed postoperatively, as preoperative imaging alone may lead to new obstruction sites during surgery. Imaging options include open vasography or percutaneous vasography. The most common surgical technique for VE is end-to-side anastomosis.
Treatment for obstructive azoospermia: Traditional diagnostic methods for ejaculatory duct obstruction typically involve vasography. However, newer techniques include transrectal or transperineal seminal vesiculography, which reduce the risk of causing vas deferens obstruction compared to conventional approaches.With technological advancements, transrectal MRI can now confirm ejaculatory duct obstruction in azoospermia cases, where the maximum diameter of the seminal vesicles exceeds 1.5 cm, indicating obstruction. The traditional treatment for ejaculatory duct obstruction is transurethral ejaculatory duct resection.The postoperative recanalization rate of the ejaculatory duct is 50%, with a spousal pregnancy rate of 25%. However, complications may occur, primarily urinary reflux into the ejaculatory duct causing associated symptoms, along with potential damage to the rectal and external urethral sphincters. A newer treatment approach for azoospermia involves performing balloon dilation at the site of ejaculatory duct obstruction concurrently with seminal vesiculography.
CBAVD Treatment: For patients with non-recanalizable vas deferens or ejaculatory ducts, ICSI treatment is an option. However, the pregnancy rate in partners of men with obstructive azoospermia undergoing ICSI ranges only from 17% to 56%.Prior to sperm collection, both partners should undergo CF mutation testing. Multiple sperm retrieval methods exist, including testicular or epididymal sperm collection via open biopsy or percutaneous aspiration. Cryopreserved testicular and epididymal sperm can also be used for ICSI treatment, with pregnancy rates showing minimal difference compared to fresh sperm.