Can I become pregnant while pregnant?

Strangely it is true. you can get pregnant while you are pregnant. It is called a superfetation. Though this happens with very few women. In a 2009 study, it was reported that there were only 7 cases of superfetation had been reported in total. As two different development stages occur for the baby, one baby is born premature. Also such cases cannot be diagnosed while pregnant, you get to know of such a case only after delivery. This link shares a story of a female who conceived while pregnant http://ph.theasianparent.com/woman_conceives_while_pregnant/