The early age for first period is associated with many factors such as higher socio-economic status, obesity, nutritional status and general health
Haley has received high marks for her UN job performance. An April poll by Quinnipiac University found that 63 percent of voters approved of Haley, including 55 percent of Democrats.
Haley was vague about her reasons for quitting, citing a desire to take some time off. In her resignation letter, Haley referred to returning to the private sector.
Few people who have watched her over the years see her leaving the public arena for long.
"The most likely explanation is she wants to put some daylight between herself and Trump in advance of running for president," said Jordan Ragusa, a political science professor at the College of Charleston in South Carolina.
"I could certainly see a myriad of ways in which she could strengthen the ticket," said Claire Wofford, a political science professor at College of Charleston in South Carolina.
But Republican strategist Rick Tyler called the idea of Haley replacing Pence "far fetched." Tyler said her future is wide open but doubted she would rejoin the administration.
Even Russian UN Ambassador Vassily Nebenzia, with whom Haley often sparred, said she would resurface in politics.
"She's young, she's energetic, she's ambitious. I think that we will see her after she has this well-deserved respite that she was referring to," Nebenzia said.
The early age for first period is associated with many factors such as higher socio-economic status, obesity, nutritional status and general health
Hundreds of social workers and volunteers are working round the clock, providing essentials to those affected by the unprecedented rainfall
The floodwaters spared nothing, soaking their furniture, rendering household appliances useless, and destroying the newly-purchased school books
Second-placed Liverpool remain three points behind Arsenal, who have a vastly superior goal difference
The in-form Italian will move to within 330points of World No 1 Djokovic if he wins his fourth trophy of 2024 at the Madrid Open
The King, 88, had undergone gallbladder surgery in 2020
Delhi posted 224-4 courtesy of a 113-run stand between Pant (88) and fellow left-hander Axar Patel, who hit 66
The move is seen as part of Ukraine's efforts to reinforce its army as soldiers struggle to hold positions against Russia