🔬 Biology · Human Reproduction · NEET

In a 28-day menstrual cycle, the endometrium is at its thickest and most vascular during the:

Answer: Secretory (luteal) phase.

A Day of ovulation only
B Menstrual phase
C Early follicular phase
D Secretory (luteal) phase

Correct answer: D. Secretory (luteal) phase

Explanation: After ovulation the corpus luteum secretes progesterone that makes the endometrium maximally thick and glandular during the secretory phase, preparing for implantation.

Sagittal section of the human male reproductive system showing the testis, epididymis, vas deferens, seminal vesicle, prostate gland, bulbourethral gland, urethra, urinary bladder and penis

The human male reproductive system: sperm formed in the testis mature in the epididymis and travel via the vas deferens, mixing with secretions of the seminal vesicle, prostate and bulbourethral glands. Image: Wumingbai, CC BY-SA 4.0, via Wikimedia Commons.

Concept context

Male and female reproductive systems, gametogenesis, fertilization, implantation, pregnancy, and reproductive health.

Read the full Human Reproduction notes →

In a 28-day menstrual cycle, the endometrium is at its thickest and most vascular during the:

Concept context

More Human Reproduction questions