Breeding
During mating season, male reindeer usually have a group of females with which they mate. To impress a female reindeer, the male will walk around stiff-legged; with his antlers laid back, he will raise his nose and sniff the female reindeer.
It takes about seven or eight months for a mother reindeer to have her baby. She usually just gives birth to one calf, but sometimes there are twins. Reindeer babies are born during the last week of April through the middle of June.
At birth, a reindeer calf usually weighs about 9 to 18 pounds (4 - 8 kg), and can walk after it is only two hours old! Reindeer calves are brown all over, without spots or light or white coloring on their underside. Reindeer calves nurse for five months before joining the rest of the herd for the fall migration. But sometimes, there are some reindeer babies that stay with their mom for one, two, even three years.
Calves are old enough to mate in the fall after they turn two years old. Wild reindeer can live up to 15 years ... domesticated reindeer (which are smaller than their wild cousins) can live to be 25-28 years old!
Source courtesy of:http://reindeers.info/reindeer_articles/reindeer_reproduction_and_breeding/
