By Katrina Trinko, LifeNews - Health and Human Services Secretary Robert F. Kennedy even warned Thursday that the low birth rate poses “a national security threat.”... “When my uncle was president, the fertility rate in this country was 3.5%,” he said. “Today it is 1.6%. The replacement rate—in other words, the amount of fertility that you need in order to keep your population even—is 2.1%. We are below replacement right now. That is a national security threat to our country.”... But while IVF, or in vitro fertilization, gets much of the attention for solutions for infertility, it’s not the only option.