Pregnant women, from the body pregnancy has turned to the normal state, pregnant need to have a recovery process.

孕妇身体，要从怀孕状态逐渐转到孕前的正常状态，需要有一个恢复过程。

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Your body needs more of this mineral during pregnancy to keep up with your expanding blood volume.

你的身体为了赶上怀孕期间扩大的血液容量，需要更多的这种化学元素。

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Pregnancy and diabetes: Is your body ready?

糖尿病和妊娠：你的身体准备好了吗？

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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

Still, the apparent disproportionate impact of H1N1 on pregnant women is not surprising, given the body changes that occur during pregnancy, she said.

CNN: Study: H1N1 virus more severely affects pregnant women

She has chosen 51 genes to study, including those involved in the body's responses to stress and infection, in hormonal changes related to pregnancy, and in ways in which the body handles a wide variety of environmental toxins.

BBC: Gene clue to pregnancy riddle

In a special sequence, filmed every three weeks, we see in less than a minute how Philippa's body changes over the nine months of pregnancy.

BBC: The miracle of being