question:  Why did Lt. Britton go into labor 7.5mo after becoming pregnant?
context: [Transcriber's Note: This etext was produced from Worlds of If Science Fiction, October 1954. One thousand seventy-five miles above the wrinkled surface of Earth, a woman was in pain. Once every two hours, the artificial satellite looped completely around the planet, watching what went on below. Outside its bright steel hull was the silence of the interplanetary vacuum; inside, in the hospital ward, Lieutenant Alice Britton clutched at the sheets of her bed in pain, then relaxed as it faded away. Your husband may be the finest rocket jockey in the Space Service, but that doesn't give him the right to come blasting up here on a supply rocket just to get you pregnant!" "Lieutenant Britton, it is my personal opinion that you need your head examined, and not by a general practitioner, either! The terrible pressure of a rocket landing would increase her effective body weight to nearly half a ton; an adult human being couldn't take that sort of punishment for long, much less the tiny life that was growing within her. Her pregnancy had never made her uncomfortable; the slow rotation of the wheel-shaped station about its axis gave an effective gravity at the rim only half that of Earth's surface, and the closer to the hub she went, the less her weight became. According to the major, the baby was due sometime around the first of September. The depressurization hadn't hurt her too much, but the shock had been enough to start labor. "Something wrong, doctor?" "Incubator," he said, without taking his eyes off the clock. We can't deliver a seven-month preemie without an incubator." But as soon as we get within radio range of White Sands, I'll ask them to send up an emergency rocket with an incubator. It will be at least three hours before they can get a ship up here. Major Banes was in the Communications Center a full five minutes before the coastline of California appeared on the curved horizon of the globe beneath them.
output:  An accident on board pushed labor to start early
options:  The environment of outer space speeds up the amount of time a baby needs to develop  She had to induce labor to time it right so that the would be safe  She needed to have the baby before she could return to Earth so she had to induce labor  An accident on board pushed labor to start early