20-somethings have a lower chance of miscarrying and of conditions like gestational ... birth compared to 50 years ago. But isn't having kids at an older age harder on your body? And couldn't that ...

The mean gestational age did not differ (p = 0.745 ... not at high risk for preterm delivery (no history of recurrent spontaneous preterm birth, i.e., number of previous preterm deliveries ⩽1); iii) ...