"Baby Sloth" by Jorge Cancela;
used with permission under CC BY 2.0
Sloths will give birth to only one baby at a time and only one time a year. While it varies on the specific species of sloth, the female sloth may remain pregnant for up to 11.5 months, which is almost a full year of pregnancy!
Once the baby sloths are born, the mother's job is not done: the babies cling onto their mother for weeks after birth and do not leave their mother's side for up to four years! Sometimes baby sloths will fall off their mother after birth, but rarely do these falls harm the babies.
Sloths are very strong and sturdy animals that are built to climb and (sometimes) fall.