Intracytoplasmic Sperm Injection (ICSI) Treatment
Infertility can affect both men and women and may arise due to various medical or physiological factors. Fortunately, advances in reproductive medicine have made it possible for many couples to achieve pregnancy through assisted reproductive technologies (ART). Treatments such as IUI, IVF, ICSI, ZIFT, and GIFT are now widely used to address different infertility challenges.
Intracytoplasmic Sperm Injection (ICSI) is an advanced ART procedure in which a single healthy sperm is directly injected into a mature egg using a specialised microscopic needle. Fertilisation occurs in a laboratory, and the resulting embryo is later transferred into the woman’s uterus.
ICSI is most commonly performed as part of an IVF cycle and is particularly effective for couples facing male factor infertility, significantly improving the chances of successful fertilisation and pregnancy.
Who Needs ICSI?
ICSI may be recommended in the following situations:
1. Low Sperm Count
When semen analysis shows a reduced sperm count, ICSI helps achieve fertilisation by directly injecting a selected sperm into the egg.
2. Poor Sperm Motility
If sperm movement is weak or ineffective, making it difficult for sperm to reach the egg naturally, ICSI bypasses this issue.
3. Abnormal Sperm Morphology
Sperm with abnormal shape may struggle to penetrate the egg. ICSI overcomes this by placing the sperm directly inside the egg.
4. Previous Vasectomy or Surgical Sperm Retrieval
In men who have undergone vasectomy, sperm can be retrieved directly from the testicles or epididymis and used for ICSI.
5. Previous Fertility Treatment Failure
If treatments such as IUI or conventional IVF have not resulted in pregnancy, ICSI may be recommended as the next step.
ICSI Treatment: Step-by-Step
1. Initial Consultation
The couple meets a fertility specialist for a detailed evaluation to determine whether ICSI is the most suitable treatment option.
2. Ovarian Stimulation
The woman undergoes controlled ovarian stimulation using fertility medications to produce multiple mature eggs.
3. Egg Retrieval
Mature eggs are collected from the ovaries through a minimally invasive procedure, usually performed under mild anaesthesia.
4. Sperm Collection
A semen sample is collected from the male partner or donor on the same day as egg retrieval. Men are usually advised to abstain from ejaculation for 2–3 days before sample collection.
5. Sperm Preparation
The sperm sample is processed in the laboratory to isolate the healthiest and most viable sperm.
6. Sperm Injection
Using advanced micromanipulation techniques, a single healthy sperm is injected directly into each mature egg.
7. Fertilisation and Embryo Development
Fertilised eggs are monitored for normal cell division and allowed to develop into embryos over several days in the laboratory.
8. Embryo Transfer
One or more embryos are transferred into the woman’s uterus using a thin catheter, usually 3–5 days after fertilisation.
9. Pregnancy Test
A pregnancy test is performed approximately 14 days after embryo transfer to confirm treatment success.
ICSI Treatment Success Rate
ICSI is used in nearly 60% of IVF cycles worldwide. When performed by experienced fertility specialists using advanced laboratory techniques, fertilisation rates can range from 50% to 80% per cycle. Overall pregnancy success depends on several factors, including the woman’s age, egg quality, and underlying infertility causes.
Risks Associated with ICSI
Although ICSI is considered safe, some potential risks include:
1. Multiple Pregnancy
If more than one embryo is transferred, the risk of twins or higher-order pregnancies increases, which may lead to pregnancy-related complications.
2. Ovarian Hyperstimulation Syndrome (OHSS)
In rare cases, ovarian stimulation may cause OHSS, leading to symptoms such as abdominal discomfort, bloating, or shortness of breath.
3. Bleeding or Infection
There is a small risk of bleeding or infection during egg retrieval.
4. Birth Defects
Some studies suggest a slightly increased risk of birth defects compared to natural conception; however, this risk is often linked to the underlying cause of infertility rather than the ICSI procedure itself.
5. Failed Fertilisation
In some cycles, fertilisation may not occur, or embryos may fail to develop properly.
6. Emotional and Psychological Stress
Fertility treatment can be emotionally demanding and may cause stress, anxiety, or emotional fatigue.
Conclusion
ICSI has helped countless couples overcome complex infertility challenges and achieve successful pregnancies. While the journey can be emotionally and physically demanding, working closely with experienced fertility specialists and following medical guidance can significantly reduce risks and improve outcomes.
