Evaluate mother-to-infant transmission potential of SARS-CoV-2 and patterns antibody transfer following prenatal infection. Prospective cohort pregnant individuals infected with COVID-19. Samples collected at delivery included maternal swabs (nasopharyngeal/oropharyngeal, vaginal, anorectal), blood, breastmilk, newborn (nasopharyngeal, sub-amniotic), amniotic fluid, cord placenta. were analyzed...

campylobacteriosis is an important infectious disease of animals and humans caused by the pathogenic campylobacter species. a total number of 132 aborted sheep fetuses and related placentas were admitted to the large animal clinic at the university of tabriz, from october 2010 to march 2011. tissue samples were collected from several fetal organs including liver, brain, kidney, lung, spleen, he...

Organ development occurs through the coordinated interaction of distinct tissue types. So, a question at core understanding evolution new organs is, how do tissue-tissue signalling networks arise? The placenta is great model for organs, because placentas have evolved repeatedly, relatively recently in some lineages, and exhibit intermediate forms extant clades. Placentas, like other form from t...

A total of 917 Mycoplasma isolations were made from 4 092 specimens originating from 2 874 cattle in private herds and at AI stations. The percentages of isolations from the different sources were: cervico-vaginal mucus 14,6%, semen 43%, preputial wash 25%, foetuses 3,3% and placentas 15%. Mycoplasma bovigenitalium, the most common isolate, was recovered from 39% of males, 47% of females, 25% o...

Pre-eclampsia is a serious complication of pregnancy that can affect both maternal and fetal outcomes. Early-onset pre-eclampsia (EOPET) is a severe form of pre-eclampsia that is associated with altered physiological characteristics and gene expression in the placenta. DNA methylation is a relatively stable epigenetic modification to DNA that can reflect gene expression, and can provide insight...

Phylogenetic analyses of reproductive patterns have clarified several aspects of the evolution of viviparity in reptiles and mammals, and offer useful comparisons to that pattern in fishes. In amniotes, viviparity, placentation, and matrotrophy have been assumed to evolve as three successive stages in a continuous, unilinear transformation, with yolk sac placentas originating prior to chorioall...