Endometrial dating images

23 Mar

During pregnancy, the glands and blood vessels in the endometrium further increase in size and number.Vascular spaces fuse and become interconnected, forming the placenta, which supplies oxygen and nutrition to the embryo and fetus.Progesterone therapy for endometrial hyperplasia and neoplasia induces glandular secretory changes, decidual reaction, and spiral arterioles.Glandular proliferation is usually arrested, but neoplastic changes may persist and coexist with secretory changes.

It is possible to identify the phase of the menstrual cycle by reference to either the ovarian cycle or the uterine cycle by observing histological differences at each phase—for example in the ovarian cycle: The endometrium is the innermost glandular layer and functions as a lining for the uterus, preventing adhesions between the opposed walls of the myometrium, thereby maintaining the patency of the uterine cavity.Departments of Pathology and Obstetrics-Gynecology and Reproductive Science, The Mount Sinai-NYU Medical Center, New York, New York Correspondence: Liane Deligdisch, M.D., Mount Sinai Medical Center, Department of Pathology, One Gustave Levy Place, New York, NY 10029. The endometrial tissue is a sensitive target for steroid sex hormones and is able to modify its structural characteristics with promptness and versatility.Method To ensure a good specimen for morphologic interpretation, a biopsy sample should be taken from both the anterior and the posterior endometrium and fixed immediately in 10% buffered formalin.In current practice, the device that is most often used is the Pipelle endometrial aspirator.