Yes definately and sometimes it can be a few days apart. Had a lady who had twins who told us exactly when she ovulated which was twice 3days apart. When she went for her U/S at 6-7weeks there were 2 babies and they were 3days apart which confirmed to her that she did O twice and she had twins one boy one girl. A few months ago I was sure I O twice one each side 24hrs apart. I was hoping I were pregnant but I wasn't