Chicken Egg Shape Can a chicken egg come out round with no
point? The shape of a chicken's egg can vary a lot, depending on
the size, age and health of the chicken, My very small and VERY
old (nearly 12 years) silky bantam lays eggs very occasionally -
only about one a month. Her eggs are very small, about the size
of a walnut, and they are almost round. They are slightly oval
shaped, but the two ends are so close to the same shape it is
very difficult, or even sometimes impossible to decide which is
the 'pointy' end. Generally the shape of the egg is determined
by the pressures exerted by the walls of the oviduct ( egg
passage ) within the hen. A good healthy hen has strong muscles,
which push the egg through fairly quickly, and mold the egg's
shape as the shell is being formed. The 'point' is produced by
the muscles pushing on the back half of the egg to move it
through the passage. My old chicken has very weak muscles and
her eggs move very slowly. This allows time for the egg to take
the shape which is ea