{"id":44735,"date":"2023-05-18T08:03:02","date_gmt":"2023-05-18T15:03:02","guid":{"rendered":"https:\/\/timesandseasons.org\/?p=44735"},"modified":"2025-05-28T08:15:15","modified_gmt":"2025-05-28T14:15:15","slug":"the-decline-in-latter-day-saint-fertility-over-the-past-decade","status":"publish","type":"post","link":"https:\/\/timesandseasons.org\/index.php\/2023\/05\/the-decline-in-latter-day-saint-fertility-over-the-past-decade\/","title":{"rendered":"The Decline in Latter-day Saint Fertility Over the Past Decade"},"content":{"rendered":"<p>While members of the Church are known for our large families, anecdotally it has seemed that Latter-day Saint childbearing has been cratering and that we&#8217;ve been losing a lot of our fertility advantage. The problem is, getting robust, current childbearing metrics requires a fairly large sample size because it requires capturing enough women who have had a child in the past year to get reliable numbers, and surveys that ask about religion aren&#8217;t even close to being large enough.<\/p>\n<p>So here I use Census Bureau data. Specifically, I&#8217;m assuming that if Latter-day Saint fertility (quick aside, for non-medical demography &#8220;fertility&#8221; means childbearing, not the ability to bear children) has been catering we&#8217;d see it in the numbers of Utah County and Madison County, Idaho (the county where BYU-Idaho is). Here I look at changes in the Total Fertility Rate. Without going into too much of the math, the TFR is the number of children across her lifetime a woman would have if she was exposed to all of the age-specific childbearing rates of that given year. In other words, if she lived her entire life in a setting like the year 2021, that&#8217;s how many children she would have. Here I use the ACS 5-year estimates for 2021, 2016, and 2011 for TFR. (My calculated US TFR is just a hair above the published estimates. I&#8217;m not sure, but I suspect that this is because I&#8217;m including the 45-50 age bracket when some TFR calculations count up until 45, or maybe our cutoff dates are different).<\/p>\n<p>As seen, in the past ten years there has indeed been a decline in childbearing, but it looks comparable to the decline in the US more broadly. Madison County appeared to have stalled for a five-year period, but the sample size is small enough population-wise that there&#8217;s probably some noise involved there. Surprisingly to me given stereotypes about BYU-Idaho students, Madison County actually has a lower fertility rate than Utah county, although I don&#8217;t know how much of Madison County is BYU-Idaho.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-44736 aligncenter\" src=\"https:\/\/timesandseasons.org\/wp-content\/uploads\/2023\/05\/TFR-800x438.png\" alt=\"\" width=\"444\" height=\"254\" \/><\/p>\n<p>So my conjecture was wrong. Latter-day Saint fertility probably hasn&#8217;t been declining much faster than US fertility in general. (This is especially true if some of the decline in Utah County&#8217;s fertility is due to a decrease in the percent Latter-day Saint.) We&#8217;re essentially following national trends.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>While members of the Church are known for our large families, anecdotally it has seemed that Latter-day Saint childbearing has been cratering and that we&#8217;ve been losing a lot of our fertility advantage. The problem is, getting robust, current childbearing metrics requires a fairly large sample size because it requires capturing enough women who have had a child in the past year to get reliable numbers, and surveys that ask about religion aren&#8217;t even close to being large enough. So here I use Census Bureau data. Specifically, I&#8217;m assuming that if Latter-day Saint fertility (quick aside, for non-medical demography &#8220;fertility&#8221; means childbearing, not the ability to bear children) has been catering we&#8217;d see it in the numbers of Utah County and Madison County, Idaho (the county where BYU-Idaho is). Here I look at changes in the Total Fertility Rate. Without going into too much of the math, the TFR is the number of children across her lifetime a woman would have if she was exposed to all of the age-specific childbearing rates of that given year. In other words, if she lived her entire life in a setting like the year 2021, that&#8217;s how many children she would have. Here [&hellip;]<\/p>\n","protected":false},"author":10403,"featured_media":44736,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[34],"tags":[],"class_list":["post-44735","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-social-sciences-and-economics"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/timesandseasons.org\/wp-content\/uploads\/2023\/05\/TFR.png","_links":{"self":[{"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/posts\/44735","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/users\/10403"}],"replies":[{"embeddable":true,"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/comments?post=44735"}],"version-history":[{"count":6,"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/posts\/44735\/revisions"}],"predecessor-version":[{"id":50198,"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/posts\/44735\/revisions\/50198"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/media\/44736"}],"wp:attachment":[{"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/media?parent=44735"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/categories?post=44735"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/timesandseasons.org\/index.php\/wp-json\/wp\/v2\/tags?post=44735"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}