Four companies are recalling more than 165,000 inclined infant sleepers because they pose a suffocation risk for babies.

Graco, Summer Infant, Evenflo and Delta Children announced voluntary recalls last week of various inclined sleepers, according to the recall notices posted on the U.S. Consumer Product Safety Commission website. 

"Infant fatalities have been reported with other manufacturers’ inclined sleep products, after the infants rolled from their back to their stomach or side, or under other circumstances," the notices each state.

While the inclined infant category has been tied to at least 73 reported infant deaths, there have not been reports of reported fatalities in the newly recalled products, the companies said in longer recall notices on their websites. Parents are advised to stop using the products immediately and to contact companies for refunds.

Last April, Fisher-Price recalled 4.7 million Rock ‘n Play sleepers, the largest of the inclined sleeper recalls. Others followed, including Kids II, which recalled 700,000 sleepers in late April 2019.

Graco is the largest of the four recalls and is asking parents to stop using 111,000 of its Little Lounger Rocking Seat sleepers.

Inclined sleepers conflict with what the American Academy of Pediatrics recommends for safe sleeping, which is putting infants to sleep on their backs on a firm, flat surface in a bare crib, bassinet or play yard.

“For years, we’ve known that inclined sleepers threaten babies’ lives, and tragically, the evidence keeps piling up," Grace Brombach, U.S. PIRG Education Fund Consumer Watchdog associate, said in a statement. "Parents and caregivers should stop using any kind of inclined infant sleeper immediately, even if it hasn’t been included in a recall. All versions of these products put your baby’s life at risk."