When my wife, Diana, went into labor 12 weeks early, I was out of town. On the stunned, early-morning ride to the airport in Baltimore, I was certain our child would either not survive or that the complications would be too severe to imagine. Fending off the grimmest thoughts, I rehearsed writing to loved ones to explain what had happened.
But while I was still in the car I received a call from my father-in-law at Cambridge Hospital, first congratulating me on the birth of my son and then informing me of a “best-case scenario.’’ The baby had received a high Apgar score - a rating of overall infant health - and weighed 3 pounds, 2 ounces, in the 90th percentile for his gestational age. Diana’s father also mentioned the figure 80 percent, which I would later learn referred generally to survival for babies born at 24-32 weeks.
