OBJECTIVE: To study the biochemical and morphologic implications of different hormonal levels on endometrial development during assisted reproductive technology (ART) cycles. DESIGN: Prospective, controlled study. SETTING: University center. PATIENT(S): Eleven women during a natural cycle (controls) and 11 oocyte donors during an ART cycle (treated). INTERVENTION(S): At the time consistent with day-3 ET, a transvaginal ultrasound, an endometrial biopsy, and blood sampling were performed. Morphology and thickness of the endometrial stripe were recorded. Real-time reverse transcriptase-polymerase chain reaction was used to measure messenger RNA (mRNA) levels for estrogen receptor (ER)-α, ER-β, P receptor (PR)-A, and PR-B in the endometrial tissue. MAIN OUTCOME MEASURE(S): To evaluate morphologic and biochemical endometrial development. RESULT(S): Endometrium was mostly trilaminar (proliferative-like pattern) and thicker in the treated group, as opposed to homogeneous and thinner in the controls. The PR-B mRNA expression increased 41% in treated patients; PR-A mRNA expression, instead, was unchanged. Serum E(2) and P were higher in the treated group than in controls. In contrast, FSH and LH levels were lower in the treated group. CONCLUSION(S): When compared with natural cycles, exposure of the endometrium to high hormone levels during ovarian stimulation significantly increased PR-B receptor expression at the time of ET. Concurrently, a proliferative-like endometrial pattern persisted. These findings reflect a delayed endometrial development in ART.
OBJECTIVE: To study the biochemical and morphologic implications of different hormonal levels on endometrial development during assisted reproductive technology (ART) cycles. DESIGN: Prospective, controlled study. SETTING: University center. PATIENT(S): Eleven women during a natural cycle (controls) and 11 oocyte donors during an ART cycle (treated). INTERVENTION(S): At the time consistent with day-3 ET, a transvaginal ultrasound, an endometrial biopsy, and blood sampling were performed. Morphology and thickness of the endometrial stripe were recorded. Real-time reverse transcriptase-polymerase chain reaction was used to measure messenger RNA (mRNA) levels for estrogen receptor (ER)-α, ER-β, P receptor (PR)-A, and PR-B in the endometrial tissue. MAIN OUTCOME MEASURE(S): To evaluate morphologic and biochemical endometrial development. RESULT(S): Endometrium was mostly trilaminar (proliferative-like pattern) and thicker in the treated group, as opposed to homogeneous and thinner in the controls. The PR-B mRNA expression increased 41% in treated patients; PR-A mRNA expression, instead, was unchanged. Serum E(2) and P were higher in the treated group than in controls. In contrast, FSH and LH levels were lower in the treated group. CONCLUSION(S): When compared with natural cycles, exposure of the endometrium to high hormone levels during ovarian stimulation significantly increased PR-B receptor expression at the time of ET. Concurrently, a proliferative-like endometrial pattern persisted. These findings reflect a delayed endometrial development in ART.
Authors: Christos Coutifaris; Evan R Myers; David S Guzick; Michael P Diamond; Sandra A Carson; Richard S Legro; Peter G McGovern; William D Schlaff; Bruce R Carr; Michael P Steinkampf; Susan Silva; Donna L Vogel; Phyllis C Leppert Journal: Fertil Steril Date: 2004-11 Impact factor: 7.329
Authors: Ioannis Mylonas; Udo Jeschke; Naim Shabani; Christina Kuhn; Angelika Balle; Silke Kriegel; M S Markus S Kupka; Klaus Friese Journal: Acta Histochem Date: 2004 Impact factor: 2.479
Authors: Laura Detti; Rebecca A Uhlmann; Nicole M Fletcher; Michael P Diamond; Ghassan M Saed Journal: Fertil Steril Date: 2013-06-24 Impact factor: 7.329