About 13 percent of all live births in the United States are preterm, meaning the baby is born before the 37th week of pregnancy, according to the Centers for Disease Control and Prevention.

在美国约有13%的存活产婴儿是早产，这意味着在婴儿是怀孕37周之前出生的，根据美国疾病控制和预防中心的一项调查显示。

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And it's used widely for blood-clotting disorders and to help prevent recurrent miscarriage, migraines, cataracts, gum disease and pre-eclampsia (a serious complication of pregnancy).

它还被广泛应用于防止凝血失调和反复流产，偏头痛，白内障，牙龈疾病和先兆子痫(严重的妊娠并发症)。

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A review of 14 trials, involving thousands of survivors, showed that not only was pregnancy safe, it might improve their chances of beating the disease in the long-term.

对14次试验，数千名康复者的检查表明，怀孕不仅是安全的，而且从长期来看还可能增加她们对乳腺癌的抵抗力。

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Much hope had been pinned on a substance called nonoxynol-9 (the spermicide used to coat condoms that are intended to prevent pregnancy rather than disease).

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To be eligible, the mothers-to-be must have no history of cardiovascular disease, their pregnancy must not be consultant-led, and they must be under a certain BMI.

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The novels often center on themes that are rarely discussed aloud in Japanese society -- drugs, sex, pregnancy, abortion, rape and disease.

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