{"id":20943,"date":"2013-10-02T12:03:19","date_gmt":"2013-10-02T12:03:19","guid":{"rendered":"http:\/\/www.parentingclan.com\/?p=20943"},"modified":"2021-06-01T11:30:00","modified_gmt":"2021-06-01T11:30:00","slug":"men-with-smaller-testicles-predisposed-to-hands-on-parenting-study-suggests","status":"publish","type":"post","link":"https:\/\/drprem.com\/guide\/men-with-smaller-testicles-predisposed-to-hands-on-parenting-study-suggests\/","title":{"rendered":"Men with Smaller Testicles Predisposed to Hands-on Parenting, Study Suggests"},"content":{"rendered":"<div class=\"38520354a5201685ddf480eec688e1a7\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-9477973674766713\"\r\n     data-ad-slot=\"8885944693\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>New research from Emory University has found that fathers with smaller testicles are more likely to be involved in the care and nurturing of their children, Medical Daily reported.\u00a0 This is contrary to popular opinion, bigger may not always be better. According to lead author Dr. Jennifer Mascaro, the goal of the study was to find a biological mechanism that could potentially explain why some fathers devote more time to the parenting of their children than others. The relative size of a man\u2019s testicles may influence the chances of him being a good father according to a study suggesting a biological basis for parenting abilities in men. Men with larger testes are significantly less likely to display good parenting skills compared to men with smaller testes because of a well-established trade-off in evolution between mating and child-rearing, scientists said.<\/p>\n<p><!--more--><\/p>\n<p><b>Bigger May Not Always Better<\/b><\/p>\n<p>Our study is the first to investigate whether human anatomy and brain function explain this variance in parenting effort,\u201d Mascaro, an anthropologist and neuroscientist at Emory, said. In a new study published in the Proceedings of the National Academy of Sciences, Mascaro and her team recruited 70 fathers with newborns between the ages of 1 and 2 years old. \u00a0Both the dads and their children\u2019s biological mothers were asked to complete surveys regarding the fathers\u2019 involvement in hands-on childcare.<\/p><div class=\"38520354a5201685ddf480eec688e1a7\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-9477973674766713\"\r\n     data-ad-slot=\"8885944693\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>The researchers then tested the men\u2019s testosterone levels, as lower levels of the sex hormone have been associated with greater parental involvement, according to Medical Daily. \u00a0The fathers also received MRI scans of their brains to measure activity in the ventral tegmental area (VTA), an area of the brain that governs reward and parental motivation. \u00a0MRI scans were also done on the men\u2019s testes to measure volume. The fathers with smaller testicular volume had more brain activity in their VTAs and scored higher on the parenting surveys. Additionally, those with less testosterone had a modest association with better care giving, a finding the researchers linked with testicle size, since testosterone is produced in the testes<\/p>\n<p>Though the results may seem concerning, the researchers emphasized that testicle size does not necessarily control a father\u2019s parenting skills. \u201cWe&#8217;re assuming that testes size drives how involved the fathers are,&#8221; said Emory anthropologist Dr. James Rilling, whose lab led the study, &#8220;but it could also be that when men become more involved as caregivers, their testes shrink. Environmental influences can change biology.<\/p>\n<div class=\"38520354a5201685ddf480eec688e1a7\" data-index=\"3\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n          <p><a id=\"link-15\" href=\"\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n            <img decoding=\"async\" style=\"width:100%;height:auto;\" id=\"img-15\" src=\"\"><\/a><\/p>\r\n            <script>\r\n            var xmlhttp = new XMLHttpRequest();\r\n            xmlhttp.onreadystatechange = function() {\r\n              if (this.readyState == 4 && this.status == 200) {\r\n                var myObj = JSON.parse(this.responseText);\r\n                document.getElementById(\"link-\"+myObj.id).setAttribute('href',myObj.url);\r\n                document.getElementById(\"img-\"+myObj.id).setAttribute('src','https:\/\/fetch.drprem.com\/\/uploads\/'+myObj.image);\r\n              }\r\n            };\r\n            xmlhttp.open(\"GET\", \"https:\/\/fetch.drprem.com\/\/api\/Ads\/15\", true);\r\n            xmlhttp.send();\r\n            <\/script>\r\n        \r\n        <style>\r\n        *{box-sizing:border-box}.top-container{display: grid;grid-template-columns: auto auto auto;}.column{float:left;width:100%;padding: 0 7.5px 15px 7.5px;}.row{margin:0 -5px}.row:after{content:\"\";display:table;clear:both}@media screen and (max-width: 600px){.top-container{display: block;grid-template-columns: unset;}.column{width:100%;display:block;margin-bottom:20px}}.card{text-align:center;}.card_image img{width:100%}.card_body{padding:15px}.card_title{font-size: 14px;line-height: 19px;text-decoration: none;text-align:left;color: #333;}.card-heading{text-align: left;margin-bottom: 25px !important;}\r\n        <\/style>\r\n        <div class=\"row todays-top\">\r\n            <h3 class=\"card-heading\"> Recent Articles: <\/h3><div class=\"top-container\" id=\"todays-top\">\r\n        <\/div>\r\n        <\/div>\r\n        <script>\r\n            var xmlhttp = new XMLHttpRequest();\r\n            xmlhttp.onreadystatechange = function() {\r\n            if (this.readyState == 4 && this.status == 200) {\r\n            var myObj = JSON.parse(this.responseText); 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