Girl lying in grass, portrait

Newborn baby lying on mother's chest

Newborn baby lying on mother's chest

Boy lying on floor, drawing on paper with pencil

Mother and young son lying on blanket, working puzzles in newspaper together

Family relaxing outdoors

Humboldt penguins (Spheniscus humboldti)

Man lying on stomach looking at digital tablet

Woman lying on stomach on bed, looking away

Woman lying on stomach on bed, smiling at camera

"Young woma lying on stomach, listening to headphones"

Woman lying on stomach near laptop, smiling at camera

Preteen girl lying on stomach using laptop computer

Girl lying on stomach outdoors, playing handheld video game

"Young woman lying on stomach with digital tablet, portrait"

"Young woman lying on stomach, looking at digital tablet"

"Young woman lying on stomach with hand under chin, portrait"

Woman lying on stomach, wrapped in towel, head on hand

Woman lying on stomach on bed, looking away, smiling

A woman lying on her stomach reading and having a glass of wine

Baby lying upon stomach lifting head and shoulders supported upon arms.

Infant, lying on stomach in crib, held in an elevated prone position with straps.

Two babies, one sitting with arms raised above the head, the other lying upon stomach lifting head and shoulders supported upon arms.

Posterior view of infant lying on stomach without diaper to show area of diaper rash on baby's bottom.

A doctor listening to a pregnant womans belly with a stethoscope

girl pulling the sled and boy laying on stomach

Alligator lying on stomach