2-year study involving macroscopic examination of twin placentae was conducted at the Korle Bu Teaching Hospital in Accra, Ghana to determine the proportions of the various types of twin placentation, cord insertions and number of cord vessels and their relationships. had monochori-onic diamniotic placentae; only one (0.1%, 95% CI 0.0%–0.8%) had monochorionic monoamniotic pla-centation. Of 1529...

Résumé. La maintenance de trains est un problème particulièrement délicat lié à de nombreux enjeux à la fois financiers, sécuritaires et énergétiques. Nous nous intéressons à la mise en place d’une maintenance préventive basée sur la détection et la correction de tout comportement anormal susceptible de provoquer un problème majeur dans un futur proche. Nous proposons ainsi un outil d’aide à la...

Placental and fetal tissues were recovered from the uteri of 59 pregnant elephant that ranged in estimated age from day 1 B to month 21 of gestation. Incubation of placenta and fetal gonad, alone or in combination, with tritium-labelled cholesterol, pregnenolone and androstenedione failed to yield any labelled progestagens or oestrogens from placenta, but did produce small amounts of labelled p...

Implantation, trophoblast development and placentation are crucial processes in the establishment and development of normal pregnancy. Abnormalities of these processes can lead to pregnancy complications known as the great obstetrical syndromes: preeclampsia, intrauterine growth restriction, fetal demise, premature prelabor rupture of membranes, preterm labor, and recurrent pregnancy loss. Ther...

The success of pregnancy depends on a receptive endometrium, a normal blastocyst, a synchronized cross-talk at the maternal–fetal interface at the time of implantation, and finally a successful placentation and remodeling of uterine vasculature. In routine, less than 5% of oocytes collected in in vitro fertilization (IVF) cycles and only 20 to 25% of embryos transferred lead to a birth. Implant...

The high neonatal and maternal morbidity and mortality associated with the extremes of birth weight is referred to as the obstetric dilemma. Pre-eclampsia and other conditions that lead to low birth weight are considered as the Great Obstetrical Syndromes (GOS). At the other extreme is high birth weight resulting in obstructed labour. Fetal weight largely depends on placental function and defec...

Implantation of the embryo in the uterus is a critical and complex event and its failure is widely considered an impediment to improved success in assisted reproduction. Depending on whether placentation is invasive or superficial (epitheliochorial), the embryo may interact transiently or undergo a prolonged adhesive interaction with the uterine epithelium. Numerous candidate interactions have ...