Doctors 警告する of 需要・要求する for "vaginal seeding" にもかかわらず thin 証拠
By Kate Kelland
LONDON, Feb 24 (Reuters) - British doctors say more parents are requesting いわゆる "vaginal seeding", when a swab from the mother's vagina is wiped into a newborn's mouth after caesarean-section birth, にもかかわらず a 欠如（する） of 証拠 for its 医療の 利益s.
The practice, also known as microbirthing, 伴う／関わるs wiping the swab over the baby's mouth, 注目する，もくろむs, 直面する and 肌 to bring it into 接触する with bacteria from the birth canal.
The hope is this may 上げる their gut bacteria, and 減ずる 危険 of 条件s such as アレルギーs or obesity, 専門家s explained in a 報告（する）／憶測 in the BMJ British 医療の 定期刊行物 - yet 科学の 証拠 to support it is 厳しく 欠如（する）ing.
"需要・要求する for this 過程 has 増加するd の中で women …に出席するing hospitals in the UK - but this has outstripped professional 認識／意識性 and 指導／手引," said Aubrey Cunnington, an 名誉として与えられる 顧問 in paediatric 感染性の 病気s at 皇室の College London, who co-wrote the BMJ 報告（する）／憶測.
"There is 簡単に no 証拠 to 示唆する it has 利益s - and it may carry 可能性のある 危険s."
Some 熟考する／考慮するs 示唆する that babies born by C-section have a different microbiome - the collection of millions of bacteria living in the gut - to those born vaginally.
Around one in four babies in Britain are born 経由で caesarean sectio n, によれば the BMJ 報告（する）／憶測, co-written by Cunningham and five other doctors.
研究 also shows that C-section babies have わずかに 増加するd 危険 of developing 条件s such as obesity, アレルギーs and autoimmune 病気s later in life.
Cunnington said a theory has developed that this may be because the bacteria the baby is exposed to in the birth canal during a vaginal birth colonise the baby's gut, so exposing those who 行方不明になる out on it might help 保護する them.
"People have made a leap of logic that gut bacteria must be the link between caesarean section and 危険 of these 病気s," Cunningham said. "But we just don't know this for sure - or whether we can even 影響（力） this by transferring bacteria on a swab from mum to baby."
He 追加するd that while there is no 証拠 of 利益s from "vaginal seeding", the practice has 可能性のある 危険s such as transferring harmful bacteria to the baby.
"Doctors, nurses, midwives and parents need to be aware they are doing something with a 可能性のある 危険 that 現在／一般に doesn't have any 証拠 of 利益," Cunnington said.
He 追加するd that 証拠-based 介入s, such as encouraging breast feeding and 避けるing unnecessary 抗生物質s, could be "more important to a baby's gut bacteria than worrying about transferring vaginal fluid on a swab". (Editing by Dominic Evans)
