The Royal College of Midwives has launched an online petition calling for 5,000 more midwives in the NHS in England.
The Government must address the "serious shortage" of midwives, the RCM has said.
Long-term vacancy rates for midwives have steadily increased in recent years, the Care Quality Commission (CQC) report found.
Although births in England increased by over 21% between 2001 and 2010, the number of midwives only increased by around 15%, from 18,048 to 20,790.
The CQC report, which is based on findings from unannounced inspections of 14,000 health and social care providers in England, found that across the board one in 10 institutions were failing to meet staffing standards.
Daybreak's chief correspondent Richard Gaisford reports.