Question

Spinnbarkeit test of the cervical mucus is used to measure

• A. Fern pattern
• B. Elasticity
• C. pH
• D. Viscosity

Hint:

Cervical Mucus Estrus Tests:
Spinnbarkeit Test $\rightarrow$ Measures ELASTICITY Threadability (peaks at estrus).
Fern Test (Arborization) $\rightarrow$ Measures crystallization pattern under Estrogen.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Biophysical rheology of cervical mucus during estrus: peak estrogen concentrations induce high stretchability, elasticity, and spinnbarkeit thread formation.
Key Formula or Approach:
\[ \text{Spinnbarkeit} = \text{Maximum length (cm) to which an unbroken thread of estrous mucus can be stretched} \]

Step 2: Detailed Explanation:
In veterinary theriogenology and estrus detection:
- Spinnbarkeit (from German spinnen, to spin): The physical rheological property of cervical mucus that measures its Elasticity Threadability Stretchability.
- Under peak preovulatory Estrogen levels at standing heat (estrus), cervical mucus becomes clear, watery, and highly elastic, stretching into long, unbroken elastic threads of $10 - 20\text{ cm}$ without snapping.
- Under progesterone (diestrus), spinnbarkeit drops to zero (thick, tacky, non-elastic).

Step 3: Final Answer:
Hence, the Spinnbarkeit test is used to measure Elasticity, matching option (B).