Zona pellucida: Difference between revisions
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Following fertilization, the zona pellucida also surrounds the blastocyst during the first week of development, from which it "hatches". The zona pellucida has a role in [[F#fertilization|fertilization]], sperm binding, preventing [[P#polyspermy|polyspermy]], [[B#blastocyst|blastocyst]] development and preventing premature implantation (ectopic pregnancy). | Following fertilization, the zona pellucida also surrounds the blastocyst during the first week of development, from which it "hatches". The zona pellucida has a role in [[F#fertilization|fertilization]], sperm binding, preventing [[P#polyspermy|polyspermy]], [[B#blastocyst|blastocyst]] development and preventing premature implantation (ectopic pregnancy). | ||
'''UNSW Embryology Links:'' [http://embryology.med.unsw.edu.au/Notes/week1_5.htm Week 1 - Fertilization] | [http://embryology.med.unsw.edu.au/Notes/week1_3a.htm Week 1 - Oogenesis] | [#zona_pellucida_binding_protein_1 zona pellucida binding protein] | '''Links:''' [[CSt3.jpg|Image CSt3.jpg]] | [[Carnegie_stage_3|Carnegie stage 3]] | ||
'''UNSW Embryology Links:''' [http://embryology.med.unsw.edu.au/Notes/week1_5.htm Week 1 - Fertilization] | [http://embryology.med.unsw.edu.au/Notes/week1_3a.htm Week 1 - Oogenesis] | [#zona_pellucida_binding_protein_1 zona pellucida binding protein] | |||
Revision as of 13:20, 2 August 2009
(Latin, zona pellucida = transparent zone) A specialized extracellular matrix surrounds the developing ][O#oocyte|oocyte]] (egg, ovum) within the ovary and follwing ovulation. It consists of three types of glycoproteins Z#ZP1 ZP1, Z#ZP2 ZP2 and Z#ZP3 ZP3 which have different roles in fertilization.
Following fertilization, the zona pellucida also surrounds the blastocyst during the first week of development, from which it "hatches". The zona pellucida has a role in fertilization, sperm binding, preventing polyspermy, blastocyst development and preventing premature implantation (ectopic pregnancy).
Links: Image CSt3.jpg | Carnegie stage 3
UNSW Embryology Links: Week 1 - Fertilization | Week 1 - Oogenesis | [#zona_pellucida_binding_protein_1 zona pellucida binding protein]
