It's Alive (2009)

Lenore Harker's life takes an unexpected turn when she discovers she's pregnant, prompting her to leave grad school and create a home with her boyfriend, Frank, in the countryside. Their idyllic life quickly spirals into horror as a series of brutal deaths—both animal and human—unfold, all seemingly linked to their newborn child. As the couple grapples with the dark forces at play, their joy transforms into a chilling nightmare that threatens to unravel their family and sanity.