Expand:
ICSI

Explanation

**Step-by-Step Solution:**

1. **Identify the Acronym:** The acronym ICSI needs to be expanded. Recognize that it is a term used in reproductive health.

2. **Expand the Acronym:** ICSI stands for "Intracytoplasmic Sperm Injection."

3. **Understand the Procedure:** ICSI is a specialized form of in vitro fertilization (IVF). It is primarily used to treat severe cases of male factor infertility.

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