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Schematic representation of the embryonic skull roof in the posterior reproductive tract. Embryonic skull is orientated in the most common position (tail-first birth), denoted by the arrow above the drawing (A = anterior, P = posterior). Fontanelle area is denoted in white. Arrows denote the possible movement of the two skull roof halves during birth contractions. FA fontanelle area, MRT maternal reproductive tract, PF parietal foramen, UTF upper temporal fenestra.
