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OBJECTIVE To investigate whether oral or vaginal administration of contraceptive hormones might affect antimüllerian hormone (AMH) levels. DESIGN Prospective trial with women recruited by advertisement. Women who wished contraception were randomized between oral or vaginal estroprogestative contraception, and those who did not choose contraception were(More)
During a normal menstrual cycle, serum levels of luteinizing hormone (LH), follicle-stimulating hormone (FSH), estradiol, and progesterone can vary widely between cycles for the same woman, as well as between different woman. Reliable reference values based on the local population are important for correct interpretation of laboratory results. The purpose(More)
Human cytotrophoblast cells are invasive by virtue of their ability to secrete metalloproteinases (MMP) capable of digesting the extracellular matrix of the endometrium. It is the aim of the present study to determine which of the known MMP is responsible for this invasive behavior and to see to what extent endometrial secretions can modulate this enzymatic(More)
Cytotrophoblastic cells (CTBs) from first trimester placenta follow one of two existing differentiation pathways: villous CTBs (vCTBs) form a monolayer of polarized epithelial stem cells which proliferate and eventually differentiate by fusion to form a syncytiotrophoblast (STB) covering the entire surface of the villus, or they can break through the STB at(More)
Improved embryo culture protocols now render more feasible the possibility of obtaining human blastocysts after in-vitro fertilization. In this study we present: (i) results of blastocyst development from supernumerary embryos after co-culture on green monkey kidney epithelial cells and (ii) pregnancy rates after transfer of frozen blastocysts. In addition,(More)
In vitro, invasion of basement membrane by human trophoblast can be blocked by metalloproteinase inhibitors. The purpose of our study was to characterize these enzymes by zymography, to define their cellular origin. First-trimester cytotrophoblast cells were prepared according to the method of Kliman et al. Half of the cell suspension was further purified(More)
Because cytotrophoblastic cells (CTB) from first-trimester placenta form columns of invasive CTB they have been considered as a model for blastocyst implantation. This invasive behaviour is due to the ability of CTB to secret matrix metalloproteinases (MMPs) because tissue inhibitor of MMP (TIMP) inhibits their invasiveness. Although CTB behave like(More)
The aim of this study was to determine the effects of tumour necrosis factor alpha (TNF), interleukin-1 alpha (IL-1alpha), macrophage colony-stimulating factor (MCSF) and transforming growth factor beta (TGFbeta) on the secretion of matrix metalloproteinases (MMP), human chorionic gonadotrophin (HCG) and fetal fibronectin (fFN) by purified first trimester(More)
Our objective was to assess the value of insulin-like growth factor binding protein-1 (IGFBP-1) and other tests for the diagnosis of rupture of the membranes (ROM). We included 49 women with suspected ROM. The gold standard for membranes status was defined based on clinical examination, ultrasonography, tests results (except IGFBP-1) and labour information.(More)