This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
which of the following is not a phase of endometrium ? 
Select and explain. 
A. progestational phase, B. menstrual phase, C. ovulatory phase, D. proliferative phase
C: ovulatory phase
Answer: C: ovulatory phase 
Explanation: Following are the three phases of endometrium: 1. Proliferative phase: The lining comprises simple columnar epithelium. Stroma contains simple tubular glands. Its deeper pa contains sections of coiled aeries. 2. Progestationalphase: The glands get sacculated and touous. The sections of coiled aeries are seen in the superficial pa of thick endometrium. 3. Menstrual phase: This phase occurs due to decline of both the hormones. The endometrium becomes ischaemic and stas being shed. The vessel wall gets necrosed and blood enters the stroma and menstrual flow stas. Ref : B D Chaurasia's Human Anatomy , seventh edition , volume 2, pg.no., 426.