A Grafton man was released on $750 cash bail Monday after his arraignment on charges that he assaulted his wife, who is nine weeks pregnant. 

Noah U. Springer, 30, of 130 Keith Hill Rd., Grafton, faces one count of assault and battery and is due back in court Jan. 30. 

According to court documents and a police report, the incident began Sunday evening when police responded to a 911 call about a domestic disturbance. When officers arrived, they found the alleged victim "distraught" and were told that Springer had left the house with his 6-year-old son. 

Police asked other local departments to be on the lookout for Springer's black Lexus SUV. A short time later, Westborough police stopped and held the vehicle until Grafton police could arrive and arrest Springer. The boy, who was in the vehicle at the time, was turned over to Springer's ex-wife. 

The victim told police Springer had assaulted her in a second-floor bedroom by pulling up her coat, punching her left side and pushing her to the floor. The confrontation happened as the victim had come to the house to retrieve a suitcase. She told police she had been staying at a local hotel. 

An ambulance was dispatched, but the victim refused treatment. Later that night, however, the victim told police she had driven herself to Milford Regional Hospital to be evaluated.

Grafton police notified the Mass. Department of Children and Families of the incident.