BBC Midlands Today
BBC News, West Midlands
Women with large babies can choose how and when to give birth to a child to mitigate the risk of injury to children.
The Big Baby trial was designed to find out if labor began earlier than 38 weeks, which left babies who looked large in the uterus with shoulder dystonia at birth, where the shoulders were stuck during delivery.
Researchers say the results of the study between 2018 and 2022 show that fertility before one week to 10 days reduces the risk.
Hopefully, the £2.5 million data from Coventry will give doctors and midwives more confidence in promoting natural births.
Coventry nurse Eve Morgan participated in the 2018 study after monitoring her child could reach 9 pounds (4 kg).
Ms. Morgan suffered from gestational diabetes while pregnant and she performed a cervical scan to help you choose your natural labor.
As a result, she secured 7 pounds and 8 ounces of boy (3.4 kg) in advance 10 days.
"They said the baby grew a lot in the last week or so," she said. "I am petite myself. They said he would be big to me."
The trial was led by Siobhan Quenby, professor of obstetrics and gynecology at Warwick University, consultant at Covenwan University Hospital and Warwickshire (UHCW) NHS Trust.
The results were collected from 2,893 women from 106 hospitals in the UK who agreed to randomly allocate to inductive or standard delivery.
The muscle Ny bones of the shoulder appear in 1 of 150 vaginal delivery, delaying birth and leading to possible complications, including stretching in the nerves of the baby's neck.
The NHS said this happens more frequently in larger babies, but the uncertainty of frequency is uncertain.
It is estimated that this could affect 15 men of 25 men, including vaginal delivery.
The NHS said large babies are defined as those who weigh more than other babies of the same age.
Professor Quenby said the trial result gave women the right to decide “how and when to give birth.”
The trial data are crucial that if the baby gives birth later, he will not suffer any greater harm. It also shows that earlier delivery reduces the need for emergency caesarean sections and does not increase the risk of tearing.
"Whether you were tempted at 38 weeks or chose to wait for natural labor, the baby's results were the same in both groups," Professor Quenby said.
“There are risks of shoulder disorders in both groups, and if you wait for labor naturally, it is actually slightly higher than slightly higher – but if you wait for labor naturally, the baby will not be worse.”
She added that all babies were born in NHS hospitals, where employees were trained for natural delivery.
Komal Mehmood from Coventry is 38 weeks pregnant with her second child and is very large.
She said she found the results of the trial helpful when deciding her birth plan.
"I mean it's a natural process at the end of the day," she said. "I understand the size of the baby, but I'm confident that waiting for a normal birth shouldn't be a problem."
When asked if the data was given to her peace of mind, she said, "It must be true."
The trial was funded by the National Institute of Health and Nursing, as well as the results published in the Lancet Medical Journal.