Understanding human embryology has historically relied on comparative approaches using
mammalian model organisms. With the advent of low-input methods to investigate genetic …

The differentiation of primordial germ cells (PGCs) occurs during early embryonic
development and is critical for the survival and fitness of sexually reproducing species. Here …

The extracellular embryonic coats (embryo/blastocyst coverings) that surround early
mammalian embryos are most often still referred to as zona pellucida. Accumulating …

The blastocyst is a mammalian invention that carries the embryo from cleavage to
gastrulation. For such a simple structure, it exhibits remarkable diversity in its mode of …

Male germ cell differentiation entails the synthesis and remodeling of membrane polar lipids
and the formation of triacylglycerols (TAGs). This requires fatty acid-binding proteins …

The pregastrula stage mammalian conceptus consists of both embryonic and non‐
embryonic components. The latter forms the bulk of the tissues, provides nutrition for the …

This study provides new findings on the placenta of Monodelphis domestica and a
reconstruction of the marsupial morphotype. To achieve this, early ontogeny and …

The aim of the present study was to understand the rhythmic changes in innate immune
response in freshwater fish Channa punctatus. Furthermore, the putative role of melatonin …

Early cell lineage specification in eutherian mammals results in the formation of a pluripotent
inner cell mass (ICM) and trophoblast. By contrast, marsupials have no ICM. Here, we …

The blastocoel is a fluid-filled cavity characteristic of animal embryos at the blastula stage. Its
emergence is commonly described as the result of cleavage patterning, but this historical …