21. Knockdown or dissociation of calponin 3 from cytoskeleton in response to PKC phosphorylation promoted fusion of trophoblasts . 22. The healthy uterine microbiota at the mucosal-epithelium and trophoblast implantation site is regulated by macrophages. 23. When looking for microscopic villi, trophoblast , fetal parts, and background gestational changes in the endometrium. 24. It is secreted by the trophoblast cells into the uterine lumen in days 13-21 of pregnancy. 25. Trophoblast cells, found in the human placenta, produce many different types of microRNAs ( miRNAs ).26. It is formed by extraembryonic mesoderm and the two layers of trophoblast that surround the embryo and other membranes. 27. Multiple processes control cell lineage specification in the blastocyst to produce the trophoblast , epiblast, and primitive endoderm. 28. Further segregation of blastomeres into the trophoblast and inner cell mass are regulated by the homeodomain protein, Cdx2. 29. Trophoblasts express integrin on their cell surfaces which allow for adhesion to the extracellular matrix of the uterine wall.30. The trophoblast is the membrane that forms the wall of the blastocyst in the early development of the fetus.