ICSI Treatment

Introduction

Intracytoplasmic sperm injection (ICSI) is a laboratory technique used as part of an IVF cycle. Instead of leaving eggs and sperm together in a dish, an embryologist selects a single sperm and injects it directly into a mature egg.

This page explains how ICSI differs from conventional IVF fertilisation, when it may be considered, and what its benefits and limits are. It is general information and not a substitute for medical advice.

What Is ICSI?

ICSI takes place in the laboratory after eggs have been collected during an IVF cycle. Under a high-power microscope, the embryologist holds a mature egg in place, picks up one healthy-looking sperm with a very fine glass needle and places it inside the egg.

The next day the eggs are checked for signs of fertilisation. Fertilised eggs develop into embryos that are monitored and, if suitable, transferred to the uterus or frozen, exactly as in a standard IVF cycle.

How ICSI Differs From Conventional IVF

• In conventional IVF, many sperm are placed around each egg and one fertilises it naturally. In ICSI, one sperm is chosen and injected.
• ICSI needs far fewer sperm, so it can be used when sperm are few, weak or hard to obtain.
• Only mature eggs can be injected, so egg maturity is assessed first.
• The stimulation, egg collection and embryo transfer stages are the same as in IVF.

Who May Consider ICSI?

• A very low sperm count, poor sperm movement or unusual sperm shape
• Sperm obtained through a surgical procedure from the testicle or epididymis
• A previous IVF cycle in which few or no eggs fertilised
• Limited frozen sperm, where each sperm must be used carefully
• Some cycles that involve embryo genetic testing (see Genetic Screening), where ICSI helps avoid extra sperm DNA affecting the result
• Other situations your doctor identifies

ICSI is not automatically better for everyone. Research suggests it does not improve results when sperm quality is normal, so many doctors do not use it routinely in every IVF cycle.

When Is ICSI Recommended?

Your doctor will usually recommend ICSI after a semen analysis, which may be repeated, and a review of your IVF history. A male fertility assessment may include a physical examination, hormone tests and, in some cases, genetic tests. When sperm quality is severely reduced, ICSI is often discussed together with IVF from the start.

Sometimes the decision is made on the day of egg collection, depending on the sperm sample. It helps to talk through this possibility beforehand so there are no surprises.

How Does ICSI Work?

1. Stimulation and monitoring. As in IVF, hormone injections help several eggs develop while scans and blood tests track progress.
2. Egg retrieval. Eggs are collected under sedation or light anaesthesia in a short procedure.
3. Sperm collection. A semen sample is provided, or sperm are retrieved surgically or thawed from storage when needed.
4. Egg preparation. The cells around each egg are gently removed so the embryologist can see which eggs are mature.
5. Sperm selection and injection. A single healthy-looking sperm is selected for each mature egg and injected.
6. Fertilisation check. About 16 to 18 hours later, the eggs are checked for signs of normal fertilisation.
7. Embryo culture and transfer. Embryos are grown for several days. A healthy embryo is transferred, and others may be frozen.

Preparation and Consultation

Both partners are usually assessed before ICSI. Useful topics for your consultation include:

• The results of the semen analysis and any further male fertility tests
• Whether genetic counselling or tests are advised, particularly if the sperm count is very low or no sperm are seen in the sample
• Whether surgical sperm retrieval may be needed and what it involves
• The overall IVF plan, costs and the number of embryos to transfer
• Lifestyle steps that may support sperm health, such as stopping smoking, limiting alcohol, avoiding excess heat to the testicles and reviewing medicines with your doctor

Benefits and Limitations

Possible benefits

• Allows fertilisation when sperm are very few or weak
• Can be used with surgically retrieved or stored sperm
• Can help when fertilisation failed in a previous cycle
• Makes careful use of limited sperm samples

Limitations

• It does not improve egg quality or solve problems with the uterus
• Not every injected egg fertilises or develops into a good embryo
• It adds laboratory work and cost to an IVF cycle
• Outcomes still depend strongly on the age of the woman and the quality of her eggs
• It does not guarantee fertilisation or pregnancy

Risks and Considerations

• All the general risks of IVF, such as OHSS, egg retrieval risks, multiple pregnancy and emotional strain
• Some eggs may be damaged during injection, or may not fertilise
• Some causes of male infertility have a genetic basis, for example certain changes on the Y chromosome, which can be passed to sons. Genetic counselling can explain this
• Studies have looked at whether children conceived with ICSI have a slightly higher risk of certain health conditions. Absolute risks are small and may relate to the underlying cause of infertility, and your doctor can discuss current evidence
• Minor pain, bleeding or infection after surgical sperm retrieval, where this is needed

Factors That Affect ICSI Outcomes

• The source and quality of the sperm
• The number and maturity of eggs collected
• The age of the woman
• The skill of the embryology team and the laboratory conditions
• Embryo quality
• The health of the uterus
• Any genetic cause of male infertility
• Lifestyle factors such as smoking and weight

Your doctor can discuss how these apply to your situation. ICSI improves the chance of fertilisation in specific cases, but it cannot promise a pregnancy.

Frequently Asked Questions About ICSI

Is ICSI better than standard IVF?

Not in every case. ICSI is designed for situations such as a low sperm count or earlier fertilisation failure. When sperm quality is normal, evidence does not show a clear advantage, so your doctor will recommend the approach that suits your results.

Does ICSI harm the egg?

A small number of eggs can be damaged during injection, which is one reason several eggs are usually injected. Experienced embryologists work to keep this risk low.

Will my child inherit male infertility?

It can happen when the cause is genetic, such as certain Y chromosome changes. Not all male infertility is inherited. If a genetic cause is suspected, genetic counselling and testing can explain the possibilities.

Can ICSI be done with frozen sperm?

Yes. Frozen sperm, including sperm retrieved surgically, can often be used with ICSI, because only one healthy sperm is needed for each egg.

How do you know whether ICSI has worked?

About 16 to 18 hours after injection, the embryologist checks each egg for signs of normal fertilisation. You will be told how many eggs fertilised and how the embryos are developing.

Is ICSI always needed with IVF?

No. Many IVF cycles use conventional fertilisation. Your doctor will explain why ICSI is or is not suggested for you.

Does ICSI guarantee fertilisation or pregnancy?

No. Some eggs may not fertilise even with ICSI, and a pregnancy depends on many other factors. Your doctor will explain realistic expectations before treatment starts.

Why Choose Santana Fertility Centre?

Decisions about ICSI should be based on your results rather than routine. At Santana Fertility Centre in Sindhanur, Karnataka, we review the semen analysis and your history, explain whether ICSI is likely to help, and discuss genetic and lifestyle questions openly before treatment begins.

• A personal evaluation of both partners before ICSI is suggested
• Plain-language explanation of what happens in the laboratory
• Honest advice on when ICSI may and may not be needed
• Information about genetic counselling when it is relevant
• Care close to home in Sindhanur

You can read more about IVF and Genetic Screening, or contact our team with questions.

This page offers general information and is not a substitute for medical advice. Please speak with a qualified fertility specialist about your own situation.