{"id":10579,"date":"2026-11-02T22:28:50","date_gmt":"2026-11-02T21:28:50","guid":{"rendered":"https:\/\/seamlessbio.de\/?p=10579"},"modified":"2026-11-02T22:28:50","modified_gmt":"2026-11-02T21:28:50","slug":"us-rinderbestand-fbs-versorgung","status":"publish","type":"post","link":"https:\/\/seamlessbio.de\/de\/us-cattle-herd-fbs-supply\/","title":{"rendered":"Wiederaufbau der US-Rinderherde: Warum FBS erst knapper wird, bevor es besser wird"},"content":{"rendered":"<!-- ____________________________________________________________\n   SeamlessBio Blog Post \u2014 sb-bp Format\n   Slug:        us-cattle-herd-fbs-supply\n   SEO Title:   US Cattle Herd & FBS Supply: Why It Gets Tighter First\n   Keyphrase:   US cattle herd FBS\n   Int. links:  \/fbs-supply-shortage-2026\/ \u00b7 \/fbs-supply-shortage-2026-procurement-guide\/ \u00b7 \/batch-reservation\/ \u00b7 \/biological-raw-materials\/\n   ____________________________________________________________ -->\n\n\n<style>\n\n.sb-bpherd-hero{background:linear-gradient(135deg,#18b7b2 0%,#0d9490 100%);border-radius:12px;padding:48px 40px;margin-bottom:36px}\n.sb-bpherd-hero h1{color:#fff!important;font-size:2rem;font-weight:700;line-height:1.25;margin:0 0 14px 0}\n.sb-bpherd-hero .meta{font-size:.8rem;color:rgba(255,255,255,.75)!important;margin:0 0 18px 0;text-transform:uppercase;letter-spacing:.03em}\n.sb-bpherd-hero p{color:rgba(255,255,255,.95)!important;font-size:1.1rem;line-height:1.65;max-width:720px;margin:0}\n.sb-bpherd-card{background:#fff;border:1px solid #e8f7f7;border-radius:10px;padding:36px 40px;margin-bottom:28px}\n.sb-bpherd-card h2{font-size:1.35rem;font-weight:700;color:#0e1c2a;margin:0 0 16px 0}\n.sb-bpherd-card h3{font-size:1.05rem;font-weight:600;color:#18b7b2;margin:24px 0 10px 0}\n.sb-bpherd-card p{color:#374151;line-height:1.7;margin:0 0 14px 0}\n.sb-bpherd-card p:last-child{margin-bottom:0}\n.sb-bpherd-hl{background:#f0faf9;border-left:4px solid #18b7b2;border-radius:0 8px 8px 0;padding:20px 24px;margin:24px 0;color:#1a3a3a;line-height:1.65}\n.sb-bpherd-hl strong{color:#0d9490}\n.sb-bpherd-list{list-style:none;padding:0;margin:0 0 14px 0}\n.sb-bpherd-list li{padding:6px 0 6px 28px;position:relative;color:#374151;line-height:1.6}\n.sb-bpherd-list li::before{content:\"\u2713\";position:absolute;left:0;color:#18b7b2;font-weight:700}\n.sb-bpherd-table-wrap{overflow-x:auto;margin:16px 0}\n.sb-bpherd-table{width:100%;border-collapse:collapse;font-size:.92rem}\n.sb-bpherd-table th{background:#18b7b2;color:#fff!important;padding:11px 16px;text-align:left;font-weight:600}\n.sb-bpherd-table td{padding:10px 16px;border-bottom:1px solid #e8f7f7;color:#374151;vertical-align:top}\n.sb-bpherd-table tr:nth-child(even) td{background:#f4fefe}\n.sb-bpherd-cta{background:#18b7b2;border-radius:12px;padding:40px;text-align:center;margin-bottom:28px}\n.sb-bpherd-cta h2{color:#fff!important;font-size:1.5rem;font-weight:700;margin:0 0 12px 0}\n.sb-bpherd-cta p{color:rgba(255,255,255,.9)!important;margin:0 0 24px 0}\n.sb-bpherd-cta a.btn{display:inline-block;background:#fff;color:#18b7b2!important;font-weight:700;padding:14px 32px;border-radius:8px;text-decoration:none;font-size:1rem;margin:0 8px 8px 8px}\n.sb-bpherd-cta a.btn:hover{opacity:.88}\n.sb-bpherd-cta a.outline{background:transparent;color:#fff!important;border:2px solid rgba(255,255,255,.8)}\n.sb-bpherd-faq{margin-bottom:28px}\n.sb-bpherd-faq h2{font-size:1.35rem;font-weight:700;color:#0e1c2a;margin:0 0 20px 0}\n.sb-bpherd-faq details{border:1px solid #e8f7f7;border-radius:8px;margin-bottom:10px}\n.sb-bpherd-faq summary{background:#f9fdfd;padding:16px 20px 16px 20px;font-weight:600;color:#0e1c2a;cursor:pointer;list-style:none;position:relative;padding-right:44px}\n.sb-bpherd-faq summary::after{content:\"+\";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:1.3rem;color:#18b7b2;font-weight:300}\n.sb-bpherd-faq details[open] summary::after{content:\"\u2212\"}\n.sb-bpherd-faq details[open] summary{background:#e8f7f7}\n.sb-bpherd-faq .body{padding:16px 20px;color:#374151;line-height:1.7}\n@media(max-width:680px){.sb-bpherd-hero{padding:32px 20px}.sb-bpherd-hero h1{font-size:1.55rem}.sb-bpherd-card{padding:24px 20px}.sb-bpherd-cta{padding:28px 20px}}\n\n<\/style>\n<div class=\"sb-bpherd-hero\">\n<p class=\"meta\">Blog \u00b7 FBS \u00b7 Supply \u00b7 November 2026 \u00b7 6 min read<\/p>\n<h1>US Cattle Herd Rebuilding: Why FBS Gets Tighter Before It Gets Better<\/h1>\n<p>The US cattle herd has hit bottom. That sounds like good news for anyone buying fetal bovine serum. It is not \u2014 at least not yet. When ranchers rebuild their herds, they keep exactly the animals that FBS comes from.<\/p>\n<\/div>\n<!-- BUY BOX (SEO: links to buy pages) -->\n<h2 style=\"font-size:22px;line-height:1.3;margin:0 0 6px\">Buy fetal bovine serum (FBS) from EU stock<\/h2>\n<p style=\"margin:0 0 14px\">Request a quote or a free test sample \u2013 EU stock, no minimum order, lot reservation up to 36 months.<\/p>\n<ul style=\"margin:0;padding-left:20px;columns:2 300px;column-gap:32px\">\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fetal-bovine-serum-south-america-origin-0-1-%c2%b5m-sterile-filtered-emea-certified\/\">Fetal Bovine Serum \u2013 South American origin<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fetal-bovine-serum-us-origin-0-1-%c2%b5m-sterile-filtered-emea-certified\/\">Fetal Bovine Serum \u2013 US origin<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fbs-australia-0-1-%c2%b5m-sterile-emea-certified-bse-free-oie\/\">Fetal Bovine Serum \u2013 Australian origin<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fbs-low-igg\/\">FBS Ultra Low IgG (&lt;5 \u00b5g\/mL)<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fbs-tetracycline-free-south-america-sterile-filtered\/\">Tet-Free FBS (tetracycline-free)<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fbs-heat-inactivated-us-australia-south-america-sterile-filtered\/\">Heat Inactivated FBS<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fbs-embryonic-stem-cell-tested-fbs-for-es-cell-south-america-origin-sterile-filtered\/\">ES Cell Tested FBS<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fetal-bovine-serum-south-america-origin-low-endotoxin\/\">FBS Low Endotoxin (\u22645 EU\/mL)<\/a><\/li>\n<li style=\"margin:0 0 6px\"><a href=\"https:\/\/seamlessbio.de\/product\/fbs-male-us-origin-sterile-filtered\/\">FBS Male \u2013 testosterone-defined<\/a><\/li>\n<\/ul>\n<p style=\"margin:14px 0 0\"><a href=\"https:\/\/seamlessbio.de\/request-quote\/\" style=\"font-weight:600\">Request a quote \u2192<\/a><\/p>\n<!-- \/BUY BOX -->\n\n\n\n<h2 class=\"wp-block-heading\">The Numbers: A Herd at a 75-Year Low<\/h2>\n\n\n\n<p>The latest USDA data confirm what FBS buyers have felt for two years: the US cattle herd is smaller than at any time in living memory \u2014 and the beef cow herd, the main source of cull cows, is still shrinking.<\/p>\n<div class=\"sb-bpherd-table-wrap\"><table class=\"sb-bpherd-table\">\n<thead><tr><th>Indicator<\/th><th>Latest figure<\/th><th>Context<\/th><\/tr><\/thead>\n<tbody>\n<tr><td><strong>Total cattle and calves<\/strong> (1 Jan 2026)<\/td><td>86.2 million<\/td><td>Lowest since 1951<\/td><\/tr>\n<tr><td><strong>Beef cows<\/strong> (1 Jan 2026)<\/td><td>27.6 million<\/td><td>Lowest since 1961<\/td><\/tr>\n<tr><td><strong>2025 calf crop<\/strong><\/td><td>32.9 million<\/td><td>Smallest since 1941<\/td><\/tr>\n<tr><td><strong>Beef cows<\/strong> (1 Jul 2026)<\/td><td>28.45 million, \u22120.7% year on year<\/td><td>Still declining<\/td><\/tr>\n<tr><td><strong>Beef replacement heifers<\/strong> (1 Jul 2026)<\/td><td>3.8 million, +2.7% year on year<\/td><td>First sign of herd rebuilding<\/td><\/tr>\n<tr><td><strong>Beef cow slaughter<\/strong> (Jan\u2013Aug 2026)<\/td><td>\u221214% year on year<\/td><td>On pace for a record low<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<p style=\"font-size:.85rem;color:#777\">Sources: USDA NASS Cattle reports, January and July 2026; USDA slaughter data as analysed by the University of Kentucky. Full list at the end of this article.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where FBS Actually Comes From<\/h2>\n\n\n\n<p>FBS is collected from the fetuses of pregnant cows and heifers at slaughter. It is a by-product: no animal is slaughtered for its serum, and for meat packers it is a minor revenue stream. The volume of FBS therefore depends on one thing \u2014 how many <strong>pregnant<\/strong> animals reach the abattoir.<\/p>\n<p>According to a 2026 study in <em>Translational Animal Science<\/em> (Jungbluth, Brorsen and Peel), those animals come mainly from two groups: cull dairy cows, which are often pregnant when culled, and cull beef cows. Pregnant feedlot heifers are a minor source. On average, one fetal calf yields only about 0.4 litres of serum, and collection peaks in spring and autumn, when calves are closer to term.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why Rebuilding Makes FBS Tighter \u2014 Not Looser<\/h2>\n\n\n\n<p>Intuitively, a herd that has stopped shrinking should mean more FBS. In practice, the first years of a rebuild do the opposite, for three reasons:<\/p>\n<div class=\"sb-bpherd-card\"><h3>1. Heifers stay on the ranch<\/h3><p>A heifer retained for breeding becomes a cow instead of going to the feedlot or the abattoir. USDA counted 2.7% more beef replacement heifers in July 2026 than a year earlier. Every retained heifer is one animal fewer in the slaughter pipeline this year.<\/p><\/div>\n<div class=\"sb-bpherd-card\"><h3>2. Fewer cows are culled<\/h3><p>With calf prices at record levels, a bred cow is worth more alive than at slaughter. Beef cow slaughter fell 14% in the first eight months of 2026 \u2014 and cow slaughter is the single largest driver of fetal serum volume.<\/p><\/div>\n<div class=\"sb-bpherd-card\"><h3>3. Pregnant dairy cows calve first<\/h3><p>Dairy-beef crossbred calves now fetch high prices. As a result, dairies increasingly keep pregnant cull cows until they have calved instead of sending them to slaughter while pregnant, as the 2026 study notes.<\/p><\/div>\n<div class=\"sb-bpherd-hl\"><strong>The bottom line:<\/strong> the cattle cycle works against FBS buyers twice \u2014 first during liquidation, when there are fewer animals, and then during rebuilding, when fewer pregnant animals are slaughtered. USDA estimates the 2026 calf crop at 32.5 million head, 1.5% smaller again. Analysts expect tight cattle supplies at least through 2027; a recovery in fetal serum volumes would follow only after that.<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Will Mexican Cattle Imports Help?<\/h2>\n\n\n\n<p>In 2025 the US suspended live cattle imports from Mexico because of the New World screwworm. In August 2026, USDA began a phased reopening through the port of Douglas, Arizona, initially limited to around 700 head per day with screening of every animal.<\/p>\n<p>Imported cattle add to beef supply, but they are mostly young feeder steers and heifers bound for feedlots \u2014 not pregnant cows. For FBS volumes, the effect is marginal.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What This Means for US-Origin FBS<\/h2>\n\n\n\n<p>Many validated processes and regulatory files specify US-origin FBS. Those users cannot simply switch, so demand stays concentrated on a volume that is still shrinking. In practice, buyers should expect allocations, fewer large homogeneous lots and longer lead times for US-origin material.<\/p>\n<div class=\"sb-bpherd-table-wrap\"><table class=\"sb-bpherd-table\">\n<thead><tr><th>Origin<\/th><th>What to expect<\/th><th>Key consideration<\/th><\/tr><\/thead>\n<tbody>\n<tr><td><strong>USA<\/strong><\/td><td>Tightest availability, allocations likely<\/td><td>Reserve qualified lots early; plan volume for the full project<\/td><\/tr>\n<tr><td><strong>South America<\/strong><\/td><td>Larger volumes available<\/td><td>Check TSE\/BSE documentation requirements \u2014 see our <a href=\"\/fbs-south-american-origin-tse-bse-guide\/\">South American origin guide<\/a><\/td><\/tr>\n<tr><td><strong>Australia<\/strong><\/td><td>Smaller volumes, premium pricing<\/td><td>Strong regulatory acceptance; lots sell out quickly<\/td><\/tr>\n<\/tbody><\/table><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Four Steps for Buyers and QA Teams<\/h2>\n\n\n\n<div class=\"sb-bpherd-card\"><h3>1. Check what your specification really requires<\/h3><p>Does your process or regulatory file require US origin \u2014 or only a defined quality and an approved origin? Many research applications are not tied to a specific country.<\/p><\/div>\n<div class=\"sb-bpherd-card\"><h3>2. Reserve your qualified lot<\/h3><p>Once a lot is qualified, reserve it for the whole project. With <a href=\"\/batch-reservation\/\">SeamlessBio batch reservation<\/a>, lots can be held for up to 36 months with free storage and no prepayment.<\/p><\/div>\n<div class=\"sb-bpherd-card\"><h3>3. Qualify a second origin now<\/h3><p>Run the comparability study while there is no time pressure \u2014 not when your current lot runs out. Free test samples make this low-risk.<\/p><\/div>\n<div class=\"sb-bpherd-card\"><h3>4. Plan volume over the project lifetime<\/h3><p>Order planning per purchase order no longer works in a constrained market. Estimate total demand for the project period and secure it in one lot. Our <a href=\"\/fbs-supply-shortage-2026-procurement-guide\/\">FBS procurement guide<\/a> explains how.<\/p><\/div>\n<p>For the broader market picture, read <a href=\"\/fbs-supply-shortage-2026\/\">FBS Supply Shortage 2026<\/a>, or see all <a href=\"\/biological-raw-materials\/\">biological raw materials<\/a> we supply.<\/p>\n\n\n\n<div class=\"sb-bpherd-cta\"><h2>Secure Your FBS Lot Before the Next Allocation Round<\/h2><p>SeamlessBio supplies FBS of US, South American and Australian origin \u2014 processed and tested in Passau, Germany, with CoA and TSE\/BSE documentation. Test before you commit.<\/p><a href=\"\/fetal-bovine-serum\/\" class=\"btn\">View FBS Portfolio<\/a> <a href=\"\/batch-reservation\/\" class=\"btn outline\">Request Batch Reservation<\/a><\/div>\n\n\n\n<div class=\"sb-bpherd-faq\"><h2>Frequently Asked Questions<\/h2>\n<details><summary>Why is the US cattle herd so small?<\/summary><div class=\"body\">Several years of drought, high feed costs and strong cattle prices led ranchers to sell down their herds. On 1 January 2026, USDA counted 86.2 million cattle and calves \u2014 the lowest number since 1951.<\/div><\/details>\n<details><summary>Does a growing herd mean more FBS?<\/summary><div class=\"body\">Not at first. During rebuilding, ranchers retain heifers and cull fewer cows, so fewer pregnant animals reach slaughter. FBS volumes typically recover only once the larger herd starts culling again.<\/div><\/details>\n<details><summary>When will US FBS supply improve?<\/summary><div class=\"body\">USDA data from July 2026 show heifer retention at a level that roughly holds cow numbers steady rather than growing them. Analysts expect tight cattle supplies at least through 2027, so a recovery of US fetal serum volumes is unlikely before then.<\/div><\/details>\n<details><summary>Can I switch from US-origin FBS to another origin?<\/summary><div class=\"body\">Technically yes. For regulated processes you will need a comparability study and possibly a change to your regulatory documentation. Research users can often switch more easily. Free test samples help you qualify a second origin without risk.<\/div><\/details>\n<details><summary>Does SeamlessBio still supply US-origin FBS?<\/summary><div class=\"body\">Yes. We supply US-origin FBS alongside South American and Australian origin, and we can reserve a qualified lot for up to 36 months.<\/div><\/details>\n<\/div>\n<script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Why is the US cattle herd so small?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Several years of drought, high feed costs and strong cattle prices led ranchers to sell down their herds. On 1 January 2026, USDA counted 86.2 million cattle and calves \u2014 the lowest number since 1951.\"}},{\"@type\":\"Question\",\"name\":\"Does a growing herd mean more FBS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not at first. During rebuilding, ranchers retain heifers and cull fewer cows, so fewer pregnant animals reach slaughter. FBS volumes typically recover only once the larger herd starts culling again.\"}},{\"@type\":\"Question\",\"name\":\"When will US FBS supply improve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"USDA data from July 2026 show heifer retention at a level that roughly holds cow numbers steady rather than growing them. Analysts expect tight cattle supplies at least through 2027, so a recovery of US fetal serum volumes is unlikely before then.\"}},{\"@type\":\"Question\",\"name\":\"Can I switch from US-origin FBS to another origin?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Technically yes. For regulated processes you will need a comparability study and possibly a change to your regulatory documentation. Research users can often switch more easily. Free test samples help you qualify a second origin without risk.\"}},{\"@type\":\"Question\",\"name\":\"Does SeamlessBio still supply US-origin FBS?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. We supply US-origin FBS alongside South American and Australian origin, and we can reserve a qualified lot for up to 36 months.\"}}]}<\/script>\n\n\n\n<p style=\"font-size:.85rem;color:#777\"><strong>Sources:<\/strong> USDA NASS, <a href=\"https:\/\/esmis.nal.usda.gov\/sites\/default\/release-files\/795748\/catl0126.txt\" rel=\"nofollow noopener\" target=\"_blank\">Cattle report, 30 January 2026<\/a> \u00b7 USDA NASS, <a href=\"https:\/\/data.nass.usda.gov\/Newsroom\/printable\/2026\/07-24-2026.pdf\" rel=\"nofollow noopener\" target=\"_blank\">Cattle report, 24 July 2026<\/a> \u00b7 K. Burdine, University of Kentucky, <a href=\"https:\/\/www.beefmagazine.com\/market-news\/a-mid-year-look-at-cattle-slaughter-trends\" rel=\"nofollow noopener\" target=\"_blank\">cattle slaughter trends 2026<\/a> \u00b7 Jungbluth, Brorsen &amp; Peel (2026), <a href=\"https:\/\/academic.oup.com\/tas\/article\/doi\/10.1093\/tas\/txag044\/8651333\" rel=\"nofollow noopener\" target=\"_blank\">Production, pricing, and incentives in the fetal bovine serum market<\/a>, Translational Animal Science \u00b7 AP, <a href=\"https:\/\/abcnews.com\/International\/wireStory\/us-begin-lifting-suspension-mexican-cattle-imports-starting-135076018\" rel=\"nofollow noopener\" target=\"_blank\">US to begin lifting suspension of Mexican cattle imports<\/a>, July 2026.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The US cattle herd is at its lowest since 1951 \u2014 and rebuilding it will tighten US-origin FBS further. What the 2026 USDA data mean for your serum supply.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-10579","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>US Cattle Herd &amp; FBS Supply: Why It Gets Tighter First<\/title>\n<meta name=\"description\" content=\"US cattle herd at its lowest since 1951 \u2014 and rebuilding it tightens US-origin FBS further. 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