Pregnancy certainly has its downside, but it may have an unexpected upside as well: cells from the baby may help heal wounds in the mother, even long after it has been born.

怀孕可以确定有很多缺点，但现在或许有一个惊人的益处：胎儿的细胞可以有助于母亲的伤口愈合，并且的在他出生很长时间之后也会有这种作用。

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Now her team has shown that, in mice at least, these fetal cells also help heal skin wounds in the mother, both during and after pregnancy.

现在他的科学小组又指出，至少在老鼠中，无论是怀孕还是已生产，这种胎儿细胞都可以帮助母体的皮肤伤口愈合。

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Objective To investigate the expression of human leucocyte antigen protein G in different trophoblast cells and different stages of pregnancy.

目的探讨人类白细胞抗原G蛋白在妊娠不同阶段和不同种类滋养细胞的表达差异及生物学意义。

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Another idea is that it could involve the foreign cells left in a woman's body after a pregnancy.

VOA: special.2010.06.15

The protective effect of an early pregnancy is thought to be due to the fact that a first, full-term pregnancy stimulates the full differentiation of the cells lining the milk ducts, where most breast cancers arise.

FORBES: After 40 Years Of Research, What Do We Know About Preventing Breast Cancer?

In the case of the Mississippi baby, we know she was exposed to HIV, had HIV in her blood, and that at least some cells in her blood were found with sleeping virus though we will likely never know if those cells were from the child or maternal cells that had been transmitted during pregnancy or birth.

WSJ: Mark Siedner: About That Baby Who Was 'Cured' of HIV

In related news, scientists were recently surprised to find children's cells living in mother's brains long after pregnancy.

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