此外，该病与激素、早熟、迟绝经、乳癌相关，未孕可增加其发病率。
Early puberty, late menopause, a history of breast cancer and not having children may increase the odds of developing it.
而在8名孕女胎孕妇外周血有核红细胞及5名未孕妇女外周血中均未检出男性dna。
Male DNA was not detected in the nucleated erythrocytes from maternal peripheral blood of 8 pregnant women with female fetuses and in maternal peripheral blood of 5 non-pregnant women.
在1918年和1957年的流感大流行中，怀孕女性的死亡率较之未孕女性似乎更高……
In the previous influenza pandemics of 1918 and 1957, mortality seemed to be higher in pregnant women than in non-pregnant populations ...
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