Beyoncé reveals frightening details of her 'extremely difficult' pregnancy with twins

Beyoncé has revealed she suffered serious complications during her pregnancy with her twins, Rumi and Sir.

The mother-of-three said the situation became so serious she needed to have an emergency caesarean to ensure her babies were delivered safely.

Beyoncé spoke about her health scare in the Netflix documentary Homecoming.

Her 2017 pregnancy was "extremely difficult", Beyoncé admitted.

She was diagnosed with pre-eclampsia, which can cause high blood pressure, kidney dysfunction, swelling of hands, feet and face, and, in severe cases, dizziness, headaches and difficulties with vision, according to The Royal Women's Hospital of Victoria.

If left untreated, it can lead to convulsions and other life-threatening problems for both mother and baby.

Beyoncé said she got pregnant "unexpectedly" adding, "My body went through more than I knew it could."

"I was 218 pounds [98 kilograms] the day I gave birth," she shared in the documentary.

"I had high blood pressure. I developed toxemia, preeclampsia, and in the womb, one of my babies' heartbeats paused a few times, so I had to get an emergency C-section."

In Australia, mild pre-eclampsia occurs in 5-10% of pregnancies and severe pre-eclampsia in 1-2% of pregnancies.

The US Centers for Disease Control and Prevention reports that African-American women have a three to four times higher risk of pregnancy-related death due to the condition than white women.

The documentary also features Beyoncé in her first rehearsal post-pregnancy, as she speaks about the challenges of getting back on stage after her difficult pregnancy.

"It's my first time back home on the stage after giving birth. I'm creating my own homecoming, and it's hard," she said.

"There were days that I thought I'd never be the same, I'd never be the same physically, my strength and endurance would never be the same."