World Health Organization 2010 criteria for morphology (strict criteria) for semen analysis includes –
**Core Concept**
The World Health Organization (WHO) 2010 criteria for morphology in semen analysis is a set of strict guidelines used to evaluate the shape and structure of spermatozoa. This criterion assesses the percentage of sperm with normal morphology, which is essential for fertility and reproductive health.
**Why the Correct Answer is Right**
The WHO 2010 criteria for morphology in semen analysis includes the following parameters:
- Normal forms: A spermatozoon is considered normal if it has a well-formed head, a narrow neck, a medium-sized middle piece, and a long, thin tail with a well-defined terminal end.
- Head: The head should be oval or spherical with a maximum length of 5 μm and a maximum width of 3 μm.
- Neck: The neck should be narrow and constricted.
- Midpiece: The midpiece should be moderately long and contain the mitochondria.
- Tail: The tail should be long, thin, and have a well-defined terminal end.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the correct criteria for normal morphology in semen analysis.
* **Option B:** This option is incorrect because it does not include the correct parameters for a normal spermatozoon.
* **Option C:** This option is incorrect because it does not provide the correct dimensions for the head and neck of a normal spermatozoon.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the WHO 2010 criteria for morphology in semen analysis have been updated to WHO 2019 criteria, which include the following changes:
- The percentage of normal forms is now 4% instead of 10%.
- The criteria for normal morphology have been revised to include additional parameters, such as the presence of a well-defined acrosome.
**Correct Answer:** C.