[Study on luteal insufficiency by the two-step LH-RH test].

Area of Science:

• Reproductive Endocrinology
• Hormone Assays
• Anterior Pituitary Function

Context:

• Investigating the releasing and self-priming effects of luteinizing hormone-releasing hormone (LH-RH) on anterior pituitary gonadotropins.
• Utilizing a two-step LH-RH test with synthetic LH-RH administration at 60-minute intervals.
• Radioimmunoassay measurements of native LH, FSH, their subunits, serum progesterone (P), estradiol (E2), and prolactin (PRL).

Purpose:

• To clarify the releasing function and self-priming effect of LH-RH on pituitary gonadotropins.
• To assess anterior pituitary function in women with luteal insufficiency, post-spontaneous abortion, and in the puerperium.
• To evaluate the utility of the two-step LH-RH test for studying luteal insufficiency.

Summary:

• In women with luteal insufficiency, particularly those with lower P and E2, the initial hormone release (delta 1) was significantly higher, and the self-priming effect ratio (delta 1 delta 2) was lower compared to controls.
• Women post-spontaneous abortion showed similar delta 1 and delta 2 values to controls, indicating rapid pituitary function recovery.
• Women in the puerperium exhibited higher delta 1 and lower delta 1 delta 2 ratios, similar to luteal insufficiency, suggesting a comparable state of pituitary function.

Impact:

• The two-step LH-RH test is a valuable tool for evaluating pituitary gonadotropin synthesis and release in luteal insufficiency.
• Findings suggest that the puerperium period shares similarities with luteal insufficiency regarding pituitary gonadotropin dynamics.
• Provides insights into the hormonal regulation and recovery of the anterior pituitary in various reproductive states.