A Medford man is facing multiple charges after he allegedly assaulted a teen by cutting off her breathing and pressing down on an incision she had from recent ectopic pregnancy surgery.

Ectopic pregnancy results when a fertilized egg implants in a fallopian tube, rather than the uterus. Left untreated, the condition can lead to internal bleeding, infection and death.

The 18-year-old told Medford police she had ectopic pregnancy surgery on April 30, which required two incisions in her lower abdomen. The incisions were still healing when she and Richard Anthony Bartholomew, 22, got in an argument at about midnight on May 12 inside a trailer, according to a probable cause affidavit.

Bartholomew allegedly covered her mouth with one hand and pinched her nose shut with the other hand, making her unable to breathe or call for help for two to four minutes. He also allegedly applied pressure to one of her incisions. The teen rated her pain level as 10 on a scale of 1 to 10, the affidavit said.

On May 14, the pair got in another argument inside the teen's vehicle as they were parked outside Dairy Queen on West Main Street in Medford. When she told him to leave and get out of the vehicle, Bartholomew allegedly grabbed her keys out of the ignition and left. She went after him to get her keys back, the affidavit said.

Bartholomew allegedly punched her in the face, causing her to fall to the ground. He allegedly left the scene on his skateboard with her keys, the affidavit said.

Police later contacted Bartholomew at a trailer on Reager Street. After a brief stand-off, he came out and was taken into custody, the affidavit says.

Bartholomew faces strangulation and fourth-degree assault charges for the first alleged incident in the trailer, and third-degree robbery, fourth-degree assault and harassment charges for the second alleged incident outside Dairy Queen.

He entered not guilty pleas to all the charges Thursday in Jackson County Circuit Court and has a pre-trial conference scheduled for July 17, court records show.

Medford police went through a Domestic Violence Lethality Screen questionnaire with the teen and identified her as a person at high risk of being a victim of lethal violence. They had her speak with a domestic violence hotline counselor.

In 2013, Bartholomew pleaded guilty to fourth-degree assault after he reportedly menaced his stepfather with a knife during an argument about doing the dishes. The stepfather ran into a room, but Bartholomew broke in and bit, scratched and punched him, according to an affidavit from that case.

Reach staff reporter Vickie Aldous at 541-776-4486 or valdous@mailtribune.com. Follow her at www.twitter.com/VickieAldous.