The layer that regenerates new endometrium is the basal layer.

The layer that regenerates new endometrium is the basal layer.

• A. Basal
• B. Functional
• C. Endometrium
• D. Myometrium

Answer: (A)

The endometrium regenerates from its deepest portion after shedding. The basal layer sits closest to the myometrium and contains the stem-like cells that re‑establish the lining each cycle. After menstruation, these regenerative cells proliferate and recreate the functional layer, which then thickens again under hormonal influence. In contrast, the functional layer is the part that is shed and rebuilt, not the source of regeneration. The term endometrium refers to the entire lining, and the myometrium is the muscular wall, not the regenerative source.

The endometrium regenerates from its deepest portion after shedding. The basal layer sits closest to the myometrium and contains the stem-like cells that re‑establish the lining each cycle. After menstruation, these regenerative cells proliferate and recreate the functional layer, which then thickens again under hormonal influence. In contrast, the functional layer is the part that is shed and rebuilt, not the source of regeneration. The term endometrium refers to the entire lining, and the myometrium is the muscular wall, not the regenerative source.