April the giraffe in NY giving birth before online audience

Update 3.26pm: April the giraffe has given birth at a NY zoo as more than a million people around the world watched live.

The pregnant giraffe gave birth to her fourth calf at around 2.55pm BST on Saturday April 15, just two hours after she went into labour.

The father, a 5-year-old giraffe named Oliver, watched from an adjacent pen, the Associated Press reported.

Animal Adventure says their ultrasound equipment can not tell the sex of the calf.

April became an internet sensation after her pregnancy was livestreamed from Animal Adventure Park in Harpursville, in western NY.

"Remember in a pregnancy with a giraffe you can go 13 months, 14, 15, 16 months long", a keeper said.

Almost an hour later, the calf's small front hooves were poking out.

In an effort to possibly bring about labor, Animal Adventure Park has shifted the giraffes' bedtime to follow the "natural light cycle" of dawn and dusk. "Cancel your plans, it's time to have a baby!" While it may not sound like the most graceful way to enter the world, the fall breaks the amniotic sac, severs the umbilical cord and "most importantly, encourages the calf to take its first breaths".

Fortunately, following a public outcry the video was re-instated and April quickly became an internet sensation with millions tuning in to capture her every move. April has been pregnant for 15 months, the normal gestation time for a giraffe.

Last week, the park confirmed that April's udder has been filling up with milk, presumably getting ready for her newest addition.

People across the country have been watching the live stream for weeks in anticipation of April's baby being born, and the wait has ended.

For more than a month, viewers from across the planet - as many as 240,000 at a time - religiously tuned in to see April meander around her stall, flip moss about, and stick her tough out to get romaine lettuce.

Within minutes, April's baby - likely around six feet tall, weighing between 100 and 150 pounds - will attempt to walk on its own. April's fans can even sign up for text alerts on her progress through the park now.

"A giraffe has thick skin, a pretty compact body, it's a lot harder to find the baby when it's small", Melissa McCartney, a hoofstock keeper at Sacramento Zoo, told the local news outlet KCRA. They also note that the reason April was in her indoor stall for much of February and March was because of the cold weather outside.

Male giraffes instinctively care about three things - mating, fighting and eating.

Here are the Facebook videos of April the giraffe giving birth as they streamed live.