Precision micromanipulation
Intracytoplasmic Sperm Injection (ICSI)
Single-sperm microinjection directly into the mature oocyte cytoplasm, under high-magnification optics.
Quick facts
- Category
- Micromanipulation within an IVF cycle
- Duration
- Integrated into a standard IVF cycle (4–6 weeks)
- Egg retrieval
- Required — a minor outpatient procedure
- Laboratory
- Micromanipulation at 400x magnification
- Sedation
- Light sedation for egg retrieval; none for semen collection
- Follow-up
- Fertilisation check at 16–18 hours, then blastocyst culture
Clinical overview
Understanding ICSI Micromanipulation
Intracytoplasmic Sperm Injection (ICSI) revolutionised reproductive medicine by overcoming severe male factor barriers. In standard IVF, thousands of sperm compete to penetrate an egg naturally in culture; in ICSI, our senior embryologist isolates a single morphologically healthy, motile sperm under 400x magnification and uses an ultra-fine glass micro-needle to gently inject it directly into the mature egg cytoplasm.
Is this pathway likely to be relevant for you?
Situations in which a specialist may suggest discussing this treatment:
- Men with low sperm count (oligospermia), low motility (asthenospermia), or atypical morphology (teratospermia)
- Couples with previous IVF cycles showing unexpectedly low or absent fertilisation
Step by step
What actually happens, stage by stage
Knowing the sequence in advance removes a great deal of anxiety. Timings are typical rather than fixed, and yours will be confirmed by your specialist.
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Female ovarian stimulation
Egg cohort growth · 9–12 days
The patient follows standard IVF ovarian stimulation and monitoring protocols.
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Simultaneous retrieval and andrology
Sample processing · Day 0
Eggs are retrieved while the semen sample is prepared by density-gradient centrifugation to isolate viable sperm.
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Oocyte denudation
Enzymatic preparation · 2 hours after retrieval
Cumulus cells surrounding the eggs are gently removed to reveal the mature Metaphase-II polar body.
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High-magnification selection
Morphology screening · 30 minutes
The embryologist evaluates individual sperm at 400x magnification, assessing head symmetry and flagellar movement.
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Single-sperm microinjection
ICSI execution · 1–2 minutes per egg
A holding pipette stabilises the egg while an injection needle introduces the immobilised sperm into the cytoplasm.
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Fertilisation verification
Two pronuclei · Day 1
At 16 to 18 hours, eggs are evaluated for the appearance of two distinct pronuclei, confirming normal fertilisation.
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Blastocyst culture
Cellular cleavage · Day 2–5
Fertilised embryos develop undisturbed in physiological benchtop incubators through Day 5 or 6.
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Embryo transfer
Uterine placement · Day 5
Careful transfer of the healthiest blastocyst under gentle transabdominal ultrasound guidance.
Why this may have been suggested
Conditions that lead here
Questions answered
Frequently asked about ICSI Micromanipulation
When performed by skilled, experienced embryologists, ICSI has a high safety profile, with egg survival rates exceeding 95%.
Extensive long-term international peer-reviewed studies confirm that children born via ICSI have health, developmental and cognitive outcomes comparable to naturally conceived children.
Next step
Discuss ICSI Micromanipulation with a fertility specialist
A quiet, confidential consultation in Mysuru, or a video teleconsultation if travelling is difficult. Bring any previous reports — we will go through them with you.