She tenderly licked her baby as it began to slowly pick its head up from the floor of the pen, with at least 1.2 million people watching the zoo's YouTube streaming of the event.
The zoo is located in rural Harpursville, 15 miles (24.1 kilometers) northeast of Binghamton in upstate NY. Animal Adventure has not announced a height and weight for April's calf.
Animal Adventure Park, where April lives, later revealed on Instagram the baby giraffe is a boy.
HARPURSVILLE, N.Y. (AP) - The wait is over for April the giraffe and the legions of fans who watched a NY zoo's livestream for signs that the long-legged internet star was in labor.
It is April's fourth offspring. Animal Adventure is now closed.
The calf's father is Oliver, a five-year-old giraffe kept in the same petting zoo.More news: Clinton in 1st Interview After US Polls
The park will reveal the top 10 names at the end of the first part of the contest.
Her fans had been eagerly awaiting for the baby throughout its 15-month gestation in the Animal Adventure Park in Harpursville, in NY state. People around the world have been tuning in daily, with some growing impatient as the pregnancy seemed to drag on.
Typically, the front hooves appear first followed by the snout. A GoFundMe fundraiser page that initially set a goal of $50,000 sat at more than $125,000 on Saturday morning.
Once the calf is born, the Harpursville zoo in upstate NY will have a contest to name it.
The feed had been briefly interrupted by YouTube in February after complaints by some viewers over what they deemed to be "sexually explicit" content.