**Question:** A 28 yrs old lady, is suspected to have polycystic ovarian disease. Sample for testing LH and FSH are best taken on the following days of menstrual cycle:

A. Day 2-3
B. Day 8-10
C. Day 14-15
D. Day 21

**Answer:**

**Core Concept:**

Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) are two hormones produced by the anterior pituitary gland, which regulate the menstrual cycle and ovarian function. In the context of polycystic ovarian disease (PCOD), these hormones are often measured to assess ovarian dysfunction and hormonal imbalance.

**Why the Correct Answer is Right:**

For accurate hormone measurement, it is essential to consider the optimal time for sample collection during the menstrual cycle. Testing LH and FSH levels on the right day of the cycle allows for the most representative measurement of ovarian function.

**Why Each Wrong Option is Incorrect:**

A. Day 2-3: Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) levels are typically highest during the mid-luteal phase (Day 21-28). Sample collection on Day 2-3 might lead to an overestimation of hormone levels.

B. Day 8-10: The mid-follicular phase (Day 2-5) is the appropriate time for LH and FSH measurement, as these hormones are highest during this phase. Sampling on Day 8-10 may result in an underestimation of hormone levels.

C. Day 14-15: This corresponds to the mid-luteal phase (Day 12-28) when LH and FSH levels are typically at their peak. Sample collection on Day 14-15 might lead to an overestimation of hormone levels.

D. Day 21: As mentioned above, the best time for LH and FSH measurement is during the mid-follicular phase (Day 2-5), as these hormones are highest during this phase. Sample collection on Day 21 might result in an inaccurate hormonal assessment.

**Clinical Pearl:**

Measuring LH and FSH levels during the follicular phase (Day 2-5) provides the most accurate assessment of ovarian function in a patient suspected of having PCOD. This helps clinicians to diagnose PCOD accurately, prescribe appropriate treatment, and monitor the treatment response.

**Correct Answer:** Day 2-5 (mid-follicular phase) is the optimal time to measure LH and FSH levels in patients with suspected PCOD, ensuring accurate hormonal assessment and diagnosis.