Tragic accident in Bx.

FOR THE third time in a week, a city baby suffocated to death while sleeping in bed with a family member, cops said.

Bronx mom Crystal Alleyne, 36, woke up to find 3-month-old Jernard Moore unconscious inside her apartment on Metropolitan Ave. in Parkchester at 3:50 a.m. Wednesday.

Medics rushed the infant to Jacobi Medical Center, where he died. Police believe Alleyne accidentally rolled on top of her son.

The newborn’s death comes a month into the city’s latest campaign to educate parents and caretakers about safe sleep practices for infants.

“My heart goes out to these families,” said Dr. Deborah Kaplan, assistant commissioner for the Health Department’s Bureau of Maternal, Infant and Reproductive Health.

Each year, 40 to 50 babies are lost to sleep-related injuries, city records show.

In an effort to reduce the tragedies, the de Blasio administration has set aside $500,000 annually for a multifaceted education campaign.

The plan, in partnership with the city’s Administration for Children’s Services, includes a one-page “safe sleep” instructional flyer that will soon be mailed with every birth certificate.

“We are using every avenue,” said Lusta Phanord, the deputy director for the citywide safe sleep initiative.

The campaign will be featured in bus shelters, hair and nail salons, bodegas and laundromats.