What is ICSI?
💡 ICSI = single sperm injected directly into egg. Used for: severe oligozoospermia, azoospermia (surgically retrieved sperm), poor fertilisation on previous IVF, high DNA fragmentation. Fertilisation rate: 70–85% of mature eggs. Same IVF process — ICSI replaces the fertilisation step only. Does not improve embryo quality beyond fertilisation.
ICSI (intracytoplasmic sperm injection) is an IVF technique in which a single sperm is selected and injected directly into the cytoplasm of a mature egg using a fine glass needle under microscopic guidance. ICSI overcomes all barriers to sperm–egg fusion and is the standard fertilisation method for severe male factor infertility, surgically retrieved sperm, and repeated conventional IVF fertilisation failure.
🇮🇳 India Context: ICSI is widely assessed and treated across major Indian fertility centres including Chennai, Mumbai, Bangalore, Delhi, and Hyderabad.
What are the key characteristics of ICSI?
- Indication: severe male factor (TMC <5M post-wash, <1% morphology, high DFI); surgically retrieved sperm (TESE/PESA/MESA — all sperm from these sources must be ICSI); previous IVF fertilisation failure (<30% fertilisation); frozen sperm with expected poor survival
- Sperm selection: embryologist selects motile, morphologically normal sperm under 400x magnification; advanced selection (IMSI at 6000x, PICSI, MiOXSYS) available at specialist centres
- Procedure: MII (mature) egg immobilised; injection needle loaded with single sperm; oolemma (egg membrane) pierced; sperm deposited into cytoplasm; needle withdrawn
- Fertilisation check: 17–19 hours post-ICSI; normal fertilisation = 2 pronuclei (2PN) visible; 2PN rate: 70–85% of MII eggs
- ICSI vs conventional IVF: no difference in blastocyst quality, live birth rate, or child developmental outcomes for non-male-factor couples; conventional IVF adequate if sperm is normal
- ICSI does NOT improve poor egg quality — fertilisation happens normally in poor responders regardless; issue is embryo development post-fertilisation
- Cost: ICSI adds approximately ₹15,000–25,000 to IVF cost; not universally indicated — should not be used routinely when conventional IVF would suffice
What does ICSI involve?
Why does ICSI matter in fertility?
ICSI transformed the treatment of severe male factor infertility — men with near-zero sperm counts who previously had no path to biological fatherhood can now achieve pregnancy via ICSI with surgically retrieved testicular sperm. The key clinical caveat: ICSI is not a quality booster for poor eggs. If embryos arrest or fail to develop, the problem is egg quality (maternal age, oocyte health) — switching from conventional IVF to ICSI in a non-male-factor couple will not improve outcomes.
What are related terms to ICSI?
IVF (In Vitro Fertilisation)
IVF (In Vitro Fertilisation) is an assisted reproductive technology (ART) in whi…
Low Sperm Count (Oligospermia)
Low Sperm Count (Oligospermia) means fewer than 15 million sperm per millilitre …
Semen Analysis
Semen Analysis is the main test for evaluating male fertility. A semen sample is…
Azoospermia
Azoospermia means there is no sperm in the ejaculate. It affects about 1% of all…
FAQs about ICSI
When is ICSI recommended over standard IVF?
ICSI is recommended when there is severe male factor infertility (very low count, poor motility), previous IVF fertilisation failure, use of surgically retrieved sperm, or when few eggs are available and maximum fertilisation is needed.
Does ICSI have higher success rates than IVF?
ICSI and standard IVF have similar overall success rates (40–55% per cycle). ICSI has higher fertilisation rates (70–80% vs 50–70%), making it preferred when sperm quality is a concern.
Is ICSI safe for the baby?
Large studies show that ICSI babies have similar health outcomes to naturally conceived babies. There is a very small theoretical concern about bypassing natural sperm selection, but no significant clinical differences have been demonstrated.
How much does ICSI cost in India?
ICSI costs ₹1,50,000 to ₹3,50,000 in India, which is ₹20,000–₹50,000 more than standard IVF due to the additional micromanipulation technique.
Can ICSI help with zero sperm count?
Yes. ICSI can be combined with surgical sperm retrieval (TESA/MESA) to achieve pregnancy even in cases of azoospermia (zero sperm in ejaculate), provided viable sperm can be obtained from the testicles.
🏥 Find Specialists for ICSI in India
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