developmental arrest


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developmental arrest

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Early embryonic developmental arrest is a state of embryonic growth arrest in early pregnancy in which either no developed embryonic bud can be detected through B-scan or no embryonic heartbeat is detected despite the presence of embryonic bud.
Studies state that accumulation of ROS caused developmental arrest of embryos by altering activities and structures of mitochondria [10, 11, 14].
Loss of genes encoding a component of the preTCR complex in mice lacks the preTCR signaling and leads to the developmental arrest at DN3 stage As expected, introduction of the lost gene restores the ability to produce DP and SP cells.
Thus, unresolved psychological or emotional trauma, chronic illness, educational or cultural deficits, unhealthy parenting, and so on, can all lead to developmental arrest during this time.
In patients with congenital malformations, it is usually possible to determine the fetal age at which developmental arrest occurred.
On rare occasions, when developmental arrest occurs at an earlier stage, the coronary sinus is absent and the persistent LSVC drains directly into the atrium.
Abnormalities associated with testosterone exposure were consistent, with both aberrations in late stages of embryo maturation (Figure 1B, Table 2) and early developmental arrest (Figure 1D, Table 2).
When variable amounts of a specific monoclonal antibody to the Ku protein (Ku 162) were injected into one cell of a 2-cell embryo of Lytechinus pictus, they caused a dose-dependent developmental arrest of the injected cell.

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