**Core Concept**
In vitro fertilization (IVF) is a type of assisted reproductive technology (ART) that involves fertilizing an egg with sperm outside the human body. This process is a crucial treatment option for individuals with infertility, allowing them to conceive and carry a pregnancy to term.

**Why the Correct Answer is Right**
IVF involves several steps, including ovarian stimulation to produce multiple eggs, egg retrieval, sperm collection, fertilization of the egg with sperm, and embryo transfer into the uterus. The resulting embryo develops into a fetus and eventually a healthy baby. This process is an example of assisted reproductive technology, which helps overcome natural fertility barriers and enables individuals to conceive.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe IVF. While IVF does involve fertilization, it is not the only process involved in the treatment.
**Option B:** This option is also incorrect as it does not accurately describe IVF. IVF is not a surgical procedure, but rather an assisted reproductive technology that involves several steps outside the human body.
**Option C:** This option is incorrect as it does not accurately describe IVF. IVF is not a type of immunosuppression, but rather a treatment option for infertility.

**Clinical Pearl / High-Yield Fact**
One key aspect of IVF is the importance of ovarian stimulation to produce multiple eggs. This process involves using medications to stimulate the ovaries to produce multiple follicles, increasing the chances of obtaining healthy eggs for fertilization.

**Correct Answer:** A. In vitro fertilization is a type of assisted reproductive technology that involves fertilizing an egg with sperm outside the human body.