What is Testicular Sperm?
💡 Testicular sperm are sperm retrieved directly from testicular tissue via TESE or Micro-TESE. They are immature and non-motile — assessed for viability before ICSI injection. Sperm retrieval succeeds in 80–100% of obstructive and 30–60% of non-obstructive azoospermia cases.
Testicular sperm are sperm cells retrieved directly from testicular tissue rather than from the ejaculate. They are used exclusively with ICSI and represent the primary fertility option for men with azoospermia — both obstructive and non-obstructive.
🇮🇳 India Context: Testicular Sperm is widely assessed and treated across major Indian fertility centres including Chennai, Mumbai, Bangalore, Delhi, and Hyderabad.
What are the key characteristics of Testicular Sperm?
- Retrieved via surgical biopsy (TESE) or microsurgical extraction (Micro-TESE) directly from the testis
- Immature compared to ejaculated sperm — have not completed maturation in the epididymis
- Non-motile or minimally motile — assessed for viability using the HOS test or laser immobilisation
- Used exclusively with ICSI — cannot be used for IUI or conventional IVF fertilisation
- Sperm DNA fragmentation is lower in testicular sperm than ejaculated sperm in the same man
- Can be cryopreserved after retrieval for future ICSI cycles — avoiding repeat surgery
- Retrieval success: 80–100% in obstructive azoospermia; 30–60% in non-obstructive azoospermia
- Genetic testing recommended before retrieval if NOA — Y microdeletion, karyotype analysis
How does Testicular Sperm work?
Why does Testicular Sperm matter in fertility?
Testicular sperm retrieval is the only biological fatherhood option for azoospermic men. In obstructive azoospermia, retrieval is nearly universal and ICSI outcomes match ejaculated sperm cycles. In NOA, retrieval succeeds in 30–60% — making pre-procedure genetic counselling (Y microdeletion testing) essential. Testicular sperm have significantly lower DNA fragmentation than ejaculated sperm in men with high DFI — making them the preferred sperm source for men with recurrent IVF failure linked to elevated sperm DNA damage.
What are related terms to Testicular Sperm?
TESE
TESE (testicular sperm extraction) is a surgical procedure that retrieves sperm …
Micro-TESE
Micro-TESE (microsurgical testicular sperm extraction) is a surgical procedure p…
ICSI (Intracytoplasmic Sperm Injection)
ICSI is an advanced fertility technique. A single healthy sperm is injected dire…
Azoospermia
Azoospermia means there is no sperm in the ejaculate. It affects about 1% of all…
FAQs about Testicular Sperm
Can testicular sperm be used for IUI?
No. Testicular sperm are immature and non-motile — they cannot swim to fertilise an egg independently. They can only be used with ICSI, where a single sperm is injected directly into each mature oocyte in the IVF laboratory.
Is testicular sperm quality lower than ejaculated sperm?
Testicular sperm are immature — they have lower motility than ejaculated sperm. However, their DNA fragmentation is lower, making them preferable for men with high ejaculated sperm DNA fragmentation. ICSI fertilisation rates with testicular sperm are 60–75%.
Can testicular sperm be frozen?
Yes. Testicular sperm are routinely cryopreserved after retrieval in labelled vials. Frozen testicular sperm can be stored for years and used in future ICSI cycles — avoiding repeat surgical retrieval for each subsequent treatment cycle.
Why do testicular sperm have lower DNA fragmentation?
Ejaculated sperm accumulate DNA damage during transit through the epididymis and ejaculatory tract — particularly from oxidative stress. Testicular sperm are retrieved before this transit, exposing them to less oxidative damage and resulting in lower DNA fragmentation.
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