The INMO will announce details later of the first of a series of 24 hour strikes by members.
It’s after nurses and midwives voted overwhelmingly in favour of strike action last month:
In December, 95 percent of INMO nurses and midwives voted to go on strike in a dispute over staff shortages and pay.
Later today, the unions executive council will meet to discuss the result and decide on the next steps.
Afterwards the union says it will announce the dates of the first in a series of 24-hour national strikes.
The action will see INMO members withdraw their labour – providing only emergency and lifesaving care.
The union says that the low levels of pay mean the public health service is unable to recruit and retain enough nurses and midwives to safely