In humans lasts on average about 270 days (from conception to birth).

人类孕期平均约为270天(从怀孕到生产)。

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This video shows the development of an unborn human being from conception to birth.

海外点击过百万的经典视频，人类从怀孕到出生的发育全过程！

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Staff used three-dimensional ultrasound scans and tinycameras to film the pregnancy process from conception to birth.

工作人员使用三维超声扫描仪和微相机来拍摄从怀孕到分娩的怀孕过程。

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"This was the most difficult bill to bring from conception to birth that I can imagine being involved with, " one of the bill's primary co-sponsors, Republican Sen.

CNN: Senate OKs intelligence?overhaul bill?

Reducing any one of these by 10% would pay for the NCS. Their rarity means they have hardly ever been studied prospectively from the period of exposure before disease (which in all of them is likely to be largely between conception and birth).

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