1 The polar bodies will be eliminated.

2 In mice, however, the first polar body may sometimes divide.

3 Thus, whereas spermatocytes produce four functional haploid spermatozoa, primary oocytes eventually produce one functional haploid egg plus two polar bodies.

4 The first meiosis has produced a polar body, and this lies trapped beneath the zona pellucida.

5 Conclusion The first polar body position does not significant influence the normal fertilization and embryo development.

6 The number of the first polar body(PbI) were checked, and morphological classes of PbI were counted.

7 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.

8 The technique, called polar body array comparative genomic hybridisation, is the first that can check all of an egg's chromosomes to see if any are missing or duplicated.

9 Objective To investigate the effect of the first polar body position during the intracytoplasmic sperm injection on fertilization and embryo development.

10 The new technique checks the chromosomes in the polar body.

11 The release time of first polar body, second polar body and the start time of first cleavage about Haliotis diversicolor aquatilis's oosperm are related to the water temperature.

12 Thesecond polar body can be seen to be expelled in the second meiotic division of ovocyte.

13 But for the study of the polar body lay a solid foundation for growth Oh!

14 Near the area through which the first polar body was extruded, the microvillus of oocyte disappeared, where the second polar body might possibly be extruded.

15 After extrusion of polar body and the completion of the first cell cycle, microfilaments concentrated to the cleavage furrows.

16 But, in most species that have been looked at, the first polar body does not divide further.

17 The oocyte chromosomes lie within the cytoplasm roughly beneath this first polar body.

18 To analyze the relationships between the morphology of the first polar body and embryos and clinical pregnancy.

19 This last division and the expulsion of the second polar body occur only after fertilization.

20 To analyze the relationships between the morphology of first polar body and embryos and clinical pregnancy.

21 After fertilization membrane was lifted(), the secondary egg emitted the second polar body into the perivitelline space.

22 Conclusion Zygotes and embryo quality can be predicted by morphology of the first polar body.

23 The process uses a laser to make a small incision in the outer membrane of the egg, from which doctors can extract the polar body containing the 23 chromosomes that were expelled before fertilisation.

24 To check an egg for chromosomal abnormalities, doctors use a laser to make a small incision in the outer membrane, which allows them to extract the polar body and the chromosomes it contains.

25 The results indicated that nutria oocytes, like other rodent oocytes, can be matured in vitro, complete first meiotic division and discharge first polar body.

26 A healthy egg carries 46 chromosomes – 23 pairs – but before it can be fertilised it needs to ditch 23 of these, which it packages into a structure called a polar body.

27 To make sure the enucleation, ultraviolet light is used to check DNA located in the polar body and the metaphase plate.

28 CB can increase the two pronuclei formation rate of oocytes by inhibiting the extrusion of second polar body.

29 Tetraploids in Jinjiang oyster, Crassostrea rivularis, were induced by inhibiting the first polar body (PB1) with cytochalasin B (CB).