The endometrium becomes and thickened and more vascular glandular during the?& x20; - DSSSB - 29 August 2019 (Shift-1)

DSSSB - 29 August 2019 (Shift-1)

Obstetrics & Gynaecology

Easy

Appeared in: DSSSB - 29 August 2019 (Shift-1)

Explanation

The secretory phase occurs after ovulation and is dominated by the hormone progesterone.
Progesterone causes the endometrial glands to become tortuous (coiled) and secrete glycogen-rich fluid, hence the term 'secretory' and 'glandular'.
This hormone also increases the blood supply to the endometrium, making it more 'vascular' and thicker, creating an ideal environment for a fertilized egg to implant.
The combination of thickening, increased vascularity, and glandular secretions is the hallmark of the secretory phase.

Option A: The follicular phase is a phase of the ovarian cycle, not the uterine cycle. It corresponds to the time when ovarian follicles are developing.
Option B: During the proliferative phase, the endometrium does thicken and rebuild under the influence of estrogen, but the glands are straight and not yet secretory, and the vascularity is less developed compared to the secretory phase.
Option C: The ovulatory phase is a very brief event (the release of the egg from the ovary). It is not a phase during which the endometrium undergoes these specific structural changes.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Phases of the Uterine (Endometrial) Cycle as background academic context rather than a clinical decision trigger.
Understanding the endometrial phases is fundamental for nurses in reproductive health, fertility counseling, and family planning.
Knowledge of the secretory phase is crucial for understanding the 'implantation window' for in-vitro fertilization (IVF) procedures and for diagnosing causes of infertility related to endometrial receptivity.
What if? If fertilization and implantation do not occur, the corpus luteum degenerates, progesterone levels plummet, causing the spiral arteries to spasm. This leads to the breakdown and shedding of the highly developed endometrium, resulting in menstruation.

How to Approach the Question

First, identify the key descriptive words in the question: 'thickened', 'vascular', and 'glandular'.
Recall the two main phases of the uterine cycle: proliferative and secretory.
Differentiate the primary function of each phase. The proliferative phase is for 'proliferating' or rebuilding the lining. The secretory phase is for 'secreting' nutrients and preparing for implantation.
The word 'glandular' is a strong clue that points directly to the 'secretory' phase, as this is when the glands become fully functional and secrete substances.
Correlate the uterine phases with the ovarian phases. The follicular phase of the ovary matches the proliferative phase of the uterus. The luteal phase of the ovary matches the secretory phase of the uterus. This helps eliminate 'Follicular phase' as an answer for this uterine event.

Concept Tested & Keywords

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E6 Physiology Guyton 4SAE Part 3 p. 36-38