Embryo nidation is a complex and sequencing physiological processes.

胚床是复杂程序化生过程。

Ectopic Pregnancy is the nidation and development of the amphicytula out of the cavitas uteri .

（孕卵在子宫腔以外床、发育，宫外孕。

Abstract: Embryo nidation is a complex and sequencing physiological processes.

胚床是复杂程序化生过程。