This experiment includes 228 local Awassi ewes between 2 to 5 years
old. The aim of this experiment was to estimate the fetal age by
measurement of transthoracic, transabdominal, cotyledon length and width
during different period of gestation by using 5MHz real-time
ultrasonography. Linear, quadratic and cubic equations were described,
which adjust the relationship between the gestation age and each of
transthoracic, transabdominal, cotyledon length and width. Results indicated
that the quadratic equations of transthoracic and transabdominal were the
best equations; while the cubic equations of each of the cotyledon length and
width were the best equations to estimate the fetal age