However, the introduction of
modern farming practices during the Neolithic period sparked a gradual decline which accelerated towards the end of the Bronze Age and has largely continued until the present day.
Unlike milking
practices adopted by ancient nomadic cultures that restricted milking to the early months of pregnancy (when hormonal levels in the pregnant cows were relatively low),
modern dairy
farms maintain pregnancy in dairy cows about 80 % of the year and milk throughout pregnancy, even
during months when hormonal levels are relatively high.