The swine flu (H1N1 virus) is a new strain of influenza virus first identified in April 2009. The virus is spread by coughs or sneezes or by touching contaminated surfaces and then touching your nose or mouth. The symptoms of swine flu are similiar to other seasonal flus: fever, coughing, sore throat, and fatigue or weakness. The CDC notes that most cases worldwide have been mild. Most hospitalizations and deaths are in people who have underlying health problems such as asthma, diabetes, obesity, heart disease, or a weakened immune system.
Here are the current CDC guidelines as related to pregnancy (or those trying to conceive):
Swine flu may be more severe in pregnant than non pregnant women
Pregnant women (and those attempting pregnancy) should recieve the vaccine when available
If pregnant and suspected of having swine flu you should stat treatment immediately (do not wait for confirmation from lab tests) with Tamiflu or Relenza.
The H1N1 vaccine is currently in clinical trial and may not be available until October.