Pregnant women are more severely effected by the H1N1 flu because of their compromised immune systems. They are at a much greater risk for hospitalization and death. Women that are pregnant are first in line to receive this vaccine which is in short supply.
Many women trying to conceive (TTC) want to know if they should get the H1N1 vaccine. Doctors are divided on this. Some suggest waiting until you know you are pregnant, others think you might as well get it right away. The main reason for waiting is that the vaccine is currently in short supply. High risk groups (children and pregnant women) should be taken care of before the rest of the population. There is no harm, however, for women who are TTC in getting the shot.
Visit flu.gov for vaccine locations and additional information on H1N1
Center for disease control also has H1N1 info: cdc.gov