West Coast expectant mothers have been warned the region has no on-site specialist obstetric and gynaecology cover for two days and they may have to give birth in Christchurch.
One specialist took ill late yesterday and another is on leave.
The West Coast District Health Board could not obtain any locum cover until 5pm tomorrow, said general manager Hecta Williams.
In the meantime, Grey Base Hospital and Buller Health would continue to operate as primary birthing units.
Two more locums were due at the start of next week. No further gaps were anticipated this month.