Maya Angelou recites her poem 'On the Pulse of Morning' at the inauguration of President Bill Clinton on January 20, 1993.
Pregnant women could also go for a swim at a swimming pool, but it can also be risky in some circumstances. The chemicals used in swimming pools can be dangerous for moms-to-be and their babies, if too much is being added to the water, but normal levels of chlorine are generally OK unless the water is ingested.
While there are many foods that are safe when you're not pregnant but unsafe when you are, protein bars -- at least generally speaking -- aren't among them and should be okay to eat when pregnant. During pregnancy, you need protein -- just as you do when you're not pregnant -- to serve several purposes.