No period even after one month of medical abortion

Patient: Dear ask the doctor,My wife had a medical abortion when she was 3 weeks pregnant.Later she had bleeding for 3 weeks.Later we had sex 1 month after abortion.But i did not eject inside her.She did not get her regular period even after 30 days of abortion.Is there any possibility of getting pregnant again?Will the periods time affected by abortion?Kindly reply.