{"id":267,"date":"2016-04-29T01:56:24","date_gmt":"2016-04-29T01:56:24","guid":{"rendered":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/?post_type=chapter&#038;p=267"},"modified":"2016-09-19T23:18:04","modified_gmt":"2016-09-19T23:18:04","slug":"spermatogenesis","status":"publish","type":"chapter","link":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/chapter\/spermatogenesis\/","title":{"raw":"Spermatogenesis","rendered":"Spermatogenesis"},"content":{"raw":"Spermatogenesis occurs in the seminiferous tubules that form the bulk of each testis (see <a class=\"autogenerated-content\" href=\"https:\/\/cnx.org\/contents\/Nw1tEY4R@5\/Anatomy-and-Physiology-of-the-#fig-ch28_01_03\">Figure<\/a>). The process begins at puberty, after which time sperm are produced constantly throughout a man\u2019s life. One production cycle from spermatogonia through formed sperm takes approximately 64 days. A new cycle starts approximately every 16 days although this timing is not synchronous across the seminiferous tubules. Sperm counts\u2014the total number of sperm a man produces\u2014slowly decline after age 35, and some studies suggest that smoking can lower sperm counts irrespective of age.\r\n\r\n&nbsp;","rendered":"<p>Spermatogenesis occurs in the seminiferous tubules that form the bulk of each testis (see <a class=\"autogenerated-content\" href=\"https:\/\/cnx.org\/contents\/Nw1tEY4R@5\/Anatomy-and-Physiology-of-the-#fig-ch28_01_03\">Figure<\/a>). The process begins at puberty, after which time sperm are produced constantly throughout a man\u2019s life. One production cycle from spermatogonia through formed sperm takes approximately 64 days. A new cycle starts approximately every 16 days although this timing is not synchronous across the seminiferous tubules. Sperm counts\u2014the total number of sperm a man produces\u2014slowly decline after age 35, and some studies suggest that smoking can lower sperm counts irrespective of age.<\/p>\n<p>&nbsp;<\/p>\n\n\t\t\t <section class=\"citations-section\" role=\"contentinfo\">\n\t\t\t <h3>Candela Citations<\/h3>\n\t\t\t\t\t <div>\n\t\t\t\t\t\t <div id=\"citation-list-267\">\n\t\t\t\t\t\t\t <div class=\"licensing\"><div class=\"license-attribution-dropdown-subheading\">CC licensed content, Specific attribution<\/div><ul class=\"citation-list\"><li>OpenStax, Anatomy and Physiology of the Male Reproductive System. <strong>Authored by<\/strong>: OpenStax CNX. <strong>Located at<\/strong>: <a target=\"_blank\" href=\"http:\/\/cnx.org\/contents\/370d6d11-8e11-4b2b-8fa4-a70c14b0554b@5\">http:\/\/cnx.org\/contents\/370d6d11-8e11-4b2b-8fa4-a70c14b0554b@5<\/a>. <strong>License<\/strong>: <em><a target=\"_blank\" rel=\"license\" href=\"https:\/\/creativecommons.org\/about\/pdm\">Public Domain: No Known Copyright<\/a><\/em><\/li><\/ul><\/div>\n\t\t\t\t\t\t <\/div>\n\t\t\t\t\t <\/div>\n\t\t\t <\/section>","protected":false},"author":40,"menu_order":5,"template":"","meta":{"_candela_citation":"[{\"type\":\"cc-attribution\",\"description\":\"OpenStax, Anatomy and Physiology of the Male Reproductive System\",\"author\":\"OpenStax CNX\",\"organization\":\"\",\"url\":\"http:\/\/cnx.org\/contents\/370d6d11-8e11-4b2b-8fa4-a70c14b0554b@5\",\"project\":\"\",\"license\":\"pd\",\"license_terms\":\"\"}]","CANDELA_OUTCOMES_GUID":"","pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-267","chapter","type-chapter","status-publish","hentry"],"part":329,"_links":{"self":[{"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/pressbooks\/v2\/chapters\/267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/wp\/v2\/users\/40"}],"version-history":[{"count":1,"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/pressbooks\/v2\/chapters\/267\/revisions"}],"predecessor-version":[{"id":268,"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/pressbooks\/v2\/chapters\/267\/revisions\/268"}],"part":[{"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/pressbooks\/v2\/parts\/329"}],"metadata":[{"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/pressbooks\/v2\/chapters\/267\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/wp\/v2\/media?parent=267"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/pressbooks\/v2\/chapter-type?post=267"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/wp\/v2\/contributor?post=267"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/courses.lumenlearning.com\/contemporaryhealthissuesxpierce\/wp-json\/wp\/v2\/license?post=267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}