{"id":8636,"date":"2019-05-22T16:09:52","date_gmt":"2019-05-22T16:09:52","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/oocytes\/"},"modified":"2019-05-22T16:09:52","modified_gmt":"2019-05-22T16:09:52","slug":"oocytes","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/oocytes\/","title":{"rendered":"Oocytes"},"content":{"rendered":"<p>Immature, diploid female germ cells that undergoe two meiotic divisions to become mature ova or egg cells. &nbsp;Starting off as oogonia through a process of oocytogenesis, they become ova by a process of ootidogenesis. &nbsp;Oocytes are rich in cytoplasm that nourishes the cell during early development. &nbsp;Moreover, they are the recipients of mitochondria from maternal cells, and which go on to control embryonic metabolism and apoptosis. &nbsp;They are two types of oocytes: primary (appear before birth) and secondary (appear after birth). &nbsp;In humans, primary oocytes arise from the process of oocytogenesis during embryogenesis: oogonia in the ovaries divide and undergo the first meiosis resulting in the primary oocyte, but it only does so at the time ovulation. &nbsp;On completion of the first meiosis, the second bout of meiosis starts, but stops at the metaphase of this meiosis until fertilization by the sperma takes place. &nbsp;Every year, millions of oocytes are harvested throughout the world, and cultured in <a href=\"http:\/\/www.nlm.nih.gov\/medlineplus\/ency\/article\/007279.htm\" class=\"cc-route-enabled\" target=\"_self\" data-editable-link=\"http:\/\/www.nlm.nih.gov\/medlineplus\/ency\/article\/007279.htm&amp;target=_self\" rel=\"noopener noreferrer\">in vitro fertilization<\/a> clinics as a means offering infertile couples the opportunity of having their own children. &nbsp; &nbsp; &nbsp;<\/p>\n<p>See <a href=\"apoptosis_-or_cell_death-\">Apoptosis (or cell death)<\/a>, <a href=\"diploid\">Diploid<\/a>, <a href=\"embryogenesis\">Embryogenesis<\/a>, <a href=\"germ_plasm\">Germ plasm<\/a>, <a href=\"meiosis_-or_reduction_division-\">Meiosis (or reduction division)<\/a>, <a href=\"metaphase\">Metaphase<\/a>, <a href=\"mitochondria\">Mitochondria<\/a>, <a href=\"oogenia\">Oogenia<\/a>, <a href=\"spermatogonia\">Spermatogonia<\/a>, <a href=\"spermatozoa\">Spermatozoa<\/a><\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Immature, diploid female germ cells that undergoe two meiotic divisions to become mature ova or egg cells. &nbsp;Starting off as oogonia through a process of oocytogenesis, they become ova by a process of ootidogenesis. &nbsp;Oocytes are rich in cytoplasm that nourishes the cell during early development. &nbsp;Moreover, they are the recipients of mitochondria from maternal &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/oocytes\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Oocytes&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2],"class_list":["post-8636","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-glossary","entry"],"_links":{"self":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8636","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/comments?post=8636"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8636\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=8636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=8636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=8636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}