Question

What is the range of endometrial thickness during the follicular phase?

Options

• 5–10 mm

• 10–15 mm

• 2–5 mm

• 1 mm

Answer 1

During the follicular phase, the endometrial thickness increases to 2–5 mm. This thickening is accompanied by regeneration of new endometrial cells, uterine glands, and blood vessels as estrogen levels increase.