P1130030
Fig. 1.65: Pregwinty on Day 32. The cmbiyo lloats in the up-ptr third of the embryonic veside. The yolk sac (Y) has re-ceded considerahiy. The aliantoic sac (A) is expanding.
Fig. 1.66: Pregnancy on Day 35. The embiyo is.suspenc veiy high in the embiyonic vesicle. The yolk sac has almost appeared.
Fig. 1.67; Pregnancy on Day 40. The embiyo (arrow) desce nds back towards the floor of the vesicle whilc it hangs from the umbiiical eord which stjll shows remnants of the yolk sac.
Fig. 1.68: Pregnancy on Day 37. The embryonic vesiclc isdis-oriented. The aliantoic sac (A) lies at the top and the yolk sac (Y) at the bottom. In this marę the “ascent” of the cmbtjo within its vesicle was from the top to the bottom.
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