Fill in each blank with a suitable word given below.
among educated premature after to birthweight abortions between had miscarriages
The more miscarriages or abortions a woman has, the greater are her chances of giving birth to a child that is underweight or premature in the future, the research shows. Low birthweight (under 2500 g) and31birth (less than 37 weeks) are two of the major contributors 32 deaths33 newborm babies and infants. Rates of low34 and premature birth were highest among mothers who were black, young or old, poorly35, and unmarried. But there was a strong association 36 miscarriage and abortion and an early or underweight birth, even37 adjusting for other influential factors, such as smoking, high blood pressure and heavy drinking. Women who had 38 one, two, or three or more miscarriages or 39 in the past were almost three, five, and nine times as likely to give birth to an underweight child as those without previous. 40or abortions.
回答第（31）空
【正确答案】：premature
