Patients have been notified by letter about the missing diary
A midwife's diary containing names and addresses of hundreds of mothers and pregnant women has gone missing from a health trust in Greater Manchester.
About 345 women have been contacted by the Pennine Acute NHS Trust after the community midwife in Rochdale reported that the handwritten book was lost.
Eileen Stringer, consultant midwife, has apologised and said the loss "does not compromise clinical care".
She said that the use of hand-held diaries by staff would be reviewed.
The diary covered appointments between January and July 2008 for the midwife, who is based at Rochdale Infirmary.
Local GPs have also been informed and the incident has been formally reported to Heywood, Middleton and Rochdale Primary Care Trust.
We have carried out a very extensive search for the diary, but it has not been found yet
Ms Stringer said: "We would like to apologise for any inconvenience or concerns which this has caused.
"We've written to let women know of this issue because they have a right to know that the diary has gone missing.
"We have assured them that this in no way compromises any of their clinical care - this is a diary, not health records.
"To set some context, more than 2,000 women give birth at the infirmary annually. There is no need for anyone who has not been contacted by us to take any action whatsoever."
An information line has been set up for those whose details were in the diary.
"We have carried out a very extensive search for the diary, but it has not been found yet," Ms Stringer said.
"If it is found then obviously we will let people know."