JOURNAL ARTICLE

Endometrial glycodelin-A expression in the luteal phase of stimulated ovarian cycles

S E Brown, E Mandelin, S Oehninger, J P Toner, M Seppala, H W Jones
Fertility and Sterility 2000, 74 (1): 130-3
10899509

OBJECTIVE: To determine if controlled ovarian hyperstimulation (COH) affects the endometrial expression of glycodelin-A (GdA).

DESIGN: Prospective, controlled study.

SETTING: Tertiary infertility clinic.

PATIENT(S): Fifteen oocyte donors undergoing COH cycles and 19 natural-cycle control patients.

INTERVENTION(S): COH, endometrial biopsies.

MAIN OUTCOME MEASURE(S): Immunohistochemical scoring of endometrial GdA expression, morphologic endometrial dating, and serum E2, LH, and P4 concentrations.

RESULT(S): GdA was detected in all subjects throughout the implantation window period. Immunolocalization was demonstrated in the endometrial glands and not in the stroma or on the surface. A significantly increased proportion of GdA-staining endometrial cells were noted in COH cycle patients as compared with natural-cycling control patients throughout the window of embryo implantation. Both cycle types demonstrated increasing GdA expression throughout the late luteal phase. A significant positive correlation was noted between GdA expression and serum E2 levels (r = 0.5, P<.001) in natural cycles and advanced histology in COH cycles (r = 0.63, P=.01). Neither LH nor P4 were correlated with endometrial GdA expression.

CONCLUSION(S): COH cycles have a significantly increased endometrial GdA expression throughout the implantation phase of the luteal cycle when compared with normal menstrual cycles. The increased expression may affect implantation during COH cycles.

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