1, Zona pellucida (ZP) is a potential target antigen which is used to develop a progestational contraceptive vaccine.

2, Zona pellucida protein surrounding to oocyte is important in the proc ess of fertilization.

3, Objective : To investigate the empty zona pellucida for use in the cryopreservation of human sperm.

4, Aim:To prepare chemically deglycosylated porcine zona pellucida antigens DGZPB and DGZPC from porcine ovaries and characterize their immuno-reactivity for of developing contraceptive vaccine.

5, Objective: To investigate the clinical application of laser zona pellucida thinning assisted hatching in IVF -ET cycles.

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

7, They are trying to find their way through the zona pellucida, the membrane that surrounds and protects the egg.

8, Numerous sperm trying to to fertilise a human egg. They are trying to find their way through the zona pellucida, the membrane that surrounds and protects the egg.

9, These data indicated that the effect of antisera to the zona pellucida would mainly block fertilization and interfere early embryo development, but exists individual differences.

10, Boar sperm lectin(BSL)located on the sperm head has been found to bind to both the sperm proteins and the zona pellucida glycoprotein ZP3.

11, This stone, we see that it is an oval-shaped egg (see Figure -9. ) Surrounded by the egg zona pellucida, corona radiata and the membrane surrounding (see Figure -10).

12, Objective To construct the recombinant plasmid that highly expressed human zona pellucida 3. Methods The techniques of PCR amplification, T-A vector ligation, and sub-clone were used.

13, Objective To evaluate the effects of follicular fluid (FF) from women with endometriosis and tubal factor on sperm binding to zona pellucida under hemizona assay(HZA).

14, Objective: To study the reliability of the new enucleation method for mouse oocyte: zona pellucida dilating (ZPD) assisted enucleation method.

15, To investigate the effects of freezing and thawing procedure on human embryos survival rate and development after zona pellucida micromanipulation.

16, The sperm has fused to the egg cell membrane (oolemma) prior to becoming incorporated almost completely into the egg. The zona pellucida has been removed in this preparation.

17, The brown membrane surrounding the egg cell is the zona pellucida. The head of the sperm carries special enzymes to dissolve this membrane,[http:///zona pellucida.html] which it must do in order to fertilise the egg.

18, This might be because large breasts signal a good supply of oestrogen , and one effect of oestrogen is to make more permeable the zona pellucida, the membrane of the egg.

19, Assisted hatching (AH) is a micromanipulation procedure in which a hole is made in the zona pellucida just prior to embryo transfer to facilitate hatching of the embryo.

20, The paper reviews the constitution, molecular structure, biological function and application of zona pellucida in male fertilization.

21, Sperm surface proteins are important in sperm motility, sperm-egg recognition or binding to the zona pellucida and plasmalemma of the ovum.