Preterm birth is defined as occurring before 37 weeks of gestation, and it has a US prevalence of 10% . Three percent of preterm births are early preterm, between 20-34 weeks gestation. As shown below, preterm births are associated Analyst's Disclosure:I/we have a beneficial long position in the shares of SERA either through stock ownership, options, or other derivatives. I wrote this article myself, and it expresses my own opinions. I am not receiving compensation for it (other than from Seeking Alpha). I ...