BACKGROUND: Presently, the method of establishing human embryonic stem cells mainly contains blastula method, nuclear transplantation method and embryo blastomere method.

背景：目前人胚胎干細(xì)胞建系的技術(shù)路線主要有囊胚法舔穴在线、核移植法和胚胎單卵裂球法，但由于破壞胚胎，涉及諸多倫理問(wèn)題。

The blastula formation whose embryos were from different sources was compared and the blastomere number, quality classification and the relationship between the parity of the blastomere number and the blastula formation at d 3 were studied.

比較不同來(lái)源胚胎囊胚形成情況和d3胚胎的卵裂球數(shù)屄乱伦肏屄、質(zhì)量分級(jí)等；并利用廢棄胚胎囊胚形成情況對(duì)體外受精妊娠結(jié)局進(jìn)行預(yù)測(cè)久久中文字幕乱码久久午夜加勒比。

Interestingly, a monopolar spindle was assembled in each blastomere in the second cell cycle, and disjunction of duplicated chromosomes and the cleaage was preented, leading to the chromosome set doubling.

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Cleavage produces a blastula a sheet of cells rounded into a sphere that in most species surrounds a cavity.

卵裂產(chǎn)生一個(gè)囊胚A片不卡在线播放，形成的細(xì)胞壁球形排列形成一個(gè)空腔。

This marks the end of the cleavage stage of development.

這標(biāo)志著卵裂發(fā)育階段的結(jié)束免费婬色男女乱婬视频app。

Usually the cytoplasm in this region is incorporated into future endoderm cells .

可是在植物極也有產(chǎn)生小卵裂球的情況久草视频15。

It transforms the zygote into a cluster of cells called morula which, seen through a microscope, resembles a mulberry.

卵裂把受精卵轉(zhuǎn)換成稱為桑葚胚的細(xì)胞團(tuán)，它在顯微鏡下看起來(lái)象桑葚果黄片一A毛片。

At water temperature of 16.0-17.2 ℃, the process of embryonic development could be divided into 24 stages, which were described as follow: fertilized egg at 0 min, 2-cell stage at 75 min post fertilization; myotome forming stage at 43 h PF, and hatching-out stage at 94 h PF when the accumulative temperature reached 1616.8 ℃.h, and the average size of larvae was about 3.8 mm in body length.

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Objective To investigate the relationship between the first polar body morphology of oocyte and the zygote morphology in pronucleus stage, embryo quality in cleavage stage.

目的 探討卵細(xì)胞第一極體形態(tài)與原核期受精卵形態(tài)欧美丝袜精品一区二区、卵裂期胚胎質(zhì)量的關(guān)系性生活一级A片。

Inflorescence an axillary heads; flowers bisexual, petals5, white, ribbon-like,1.5 cm long; stamens5, filaments very short, anthers ovoid, with2 pollen sac opening each by2 vertical valves, connectives exserted; staminodes5, bifid.

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