Pregnant Yeasmin Khanom was at her desk at Chatham’s Vanquis Bank when she realised she kept needing the toilet.
Thinking she had a water infection, the 25-year-old went to Medway Maritime Hospital that night to pick up some antibiotics.
Dad Mohammed Abul Hussain, Mohammed Yameen Hussain, three, and Yeasmin Khanom with baby Mohammed Yaseen Hussain
But during the appointment she suddenly had sharp pains and felt like she was having contractions.
She was whisked into surgery where doctors discovered the wall of her uterus had torn, causing heavy bleeding and leaving no barrier between her baby and the inside of her body.
Medics had less than half an hour to deliver the baby - while worried husband Mohammed Abul Hussain, 26, a chef at Rainham’s Blue Ginger takeaway, sat in the waiting room.
Baby Mohammed Yaseen Hussain weighed just 2lb 8oz and spent 11 weeks in intensive care at the Oliver Fisher Special Care baby unit.
Mrs Khanom, of Military Road, Chatham, said: “They must have pressed an alarm because suddenly I heard all these doctors and nurses come in and talk about how the baby’s heart rate was going down.
“The doctors have said I won’t be able to have any more children but I’m just glad my baby survived" - Yeasmin Khanom
“The consultant afterwards said we were so lucky that we were at the hospital when we were, because if we weren’t she wouldn’t have been able to deliver my son.”
The condition affects fewer than one in 1,000 pregnancies and is difficult to spot, yet is often fatal for mother and baby.
A group of studies showed there is a window of just 10 to 37 minutes between a rupture and a foetus’s death.
Since the traumatic birth on May 12, Mohammed has defied the odds to gain weight and develop almost completely normally. The family celebrated when he sailed past his due date on July 31, safely at home.
Mrs Khanom said: “The doctors have said I won’t be able to have any more children but I’m just glad my baby survived.”
She added: “I’d like to thank the consultants who helped us and all the nurses at the Oliver Fisher unit. They’ve been amazing.
“I also want to thank all the friends and family who have helped us get through.”