Student Life. Harvard University has around 22,000 students across the College, graduate, and professional schools located in Cambridge and Boston. When people refer to Harvard students, often they mean the subset of roughly 6,700 students who attend Harvard College. Students arrive every year in late August.
Heifer. Heifer is the female cow who has passed the calf stage but has not reached the cow stage. Usually, the calf stage ends when the age reaches 10 months from birth. A female will be called a cow when she becomes a mother after reaching the reproductive viability. The heifer is the middle stage of the calf and cow.
Know the physiological reproductive cycle of cattle. Cows and heifers typically go into heat or estrus every 17 to 24 days (average is 21 days). A bred cow or heifer will usually not go into heat until a few weeks after giving birth. 2. Know the behaviour changes of cows and heifers going into heat.