Can I get an annulment if the woman I married lied to me about a pregnancy? Did I marry under a false pretense?

If you married her because you believed she was pregnant and then you separate from her within 45 days of the date you marry, and if there is no child born, then after you have been separated for a year, you can seek an annulment. If you did not separate within 45 days, then you cannot get an annulment, but you can get a divorce after you have been separated for one year.