"If it's going to help not to have the swine flu and keep my baby safe, I will take it," Berman-Marciano said.
"I'm much more worried now than I was before getting pregnant because now, it's not only me, it's the baby also," she added.
The first American to die of swine flu was a 33-year-old pregnant woman in Texas. Her baby girl, delivered by caesarian, survived.
Near Seattle, 27-year-old Katie Flyte is fighting for her life after complications from swine flu. Flyte was six months pregnant and caring for her sick 2-year-old when she developed flulike symptoms that were misdiagnosed. She developed pneumonia, then respiratory failure, as doctors rushed to save her premature daughter.
"Go see your doctor," Katie's husband, Kenny Flyte, told KOMO News last week. "Don't even play around."
Meantime, in Australia, doctors are urging pregnant women to stay home during this swine flu season to avoid contact with anyone suffering from the illness. In Great Britain this fall there may be advice to pregnant women to avoid large social gatherings during the anticipatedpandemic.
Today the GAO issued the latest in a series of warnings saying "gaps remain at all levels of government" when it comes to planning for a possible pandemic flu. The House Homeland Security committee meets today to discuss the state of those preparations.
"Further actions are needed to address the capacity to respond to and recover from an influenza pandemic, which will require additional capacity in patient treatment space, and the acquisition and distribution of medical and other critical supplies, such as antiviral and vaccines," the GAO report said.
The latest numbers show that more than 43,700 cases of swine flu have already been confirmed in the U.S. Fifty percent of those cases have been among people between the ages of 5 and 24.
Of all cases in the U.S., more than 5,000 people have been hospitalized and 302 have died.
The CDC's worst case scenario is that if nothing is done, 40 percent of Americans could be infected over two years, and hundreds of thousands could die.
To prevent that, health officials are working hard to prepare a swine flu vaccine.
"The lights are on in the laboratories at night," Schaffner said today. "This is a race with the virus. We intend for that vaccine to get there first."
Clinical trials for a vaccination are expected to start in August, to be followed by a voluntary vaccine program.
Pediatrician Dr. Jim Rice and his wife have decided their four children will take part in the August tests.
"I'd like my kids to be protected," Rice told "GMA." "Being able to do this as part of a trial may help contribute to the greater good, to some extent, as well," he said.
After the tests, vaccinations were initially anticipated to begin mid-October, but at today's meeting there was some concern about whether that timeline will hold. Data from the trials may not be ready for scientists to review until the end of September, and it could take another four to six weeks to begin a vaccination program. That could mean the start of the vaccine program gets pushed back into November.
"What I heard was concern that we may not be ready by October," Kristin Ehresmann, chief of the Minnesota Department of Health's immunization, tuberculosis, and international health section, said today. "If we are not going to make October, tell us now."
Schaffner called mid-October "a little bit optimistic," adding, "Everyone is working very hard to get this vaccine out as quickly as possible, but it's going to be tight."
ABC News' Olivia Hallihan, Tom Shine and ABC News' Medical Unit contributed to this report.