06/16/2026
Summer farrowing season is upon us— here sharing the experiences on our small case study this past winter. To induce or not induce— that is always the question. In my estimation— it pretty much always depends.
𝕋𝕠 𝕀𝕟𝕕𝕦𝕔𝕖 𝕠𝕣 ℕ𝕠𝕥 𝕀𝕟𝕕𝕦𝕔𝕖: 𝕋𝕙𝕚𝕤 𝕀𝕤 𝕥𝕙𝕖 𝕊𝕖𝕢𝕦𝕖𝕝 🐽💉
𝘚𝘵𝘰𝘳𝘺 𝘵𝘪𝘮𝘦 𝘸𝘪𝘵𝘩 𝘑𝘦𝘵𝘵 𝘵𝘩𝘦 𝘝𝘦𝘵…
This past winter we shared a post about the potential value of letting some sows farrow naturally, and quite a few folks chimed in with stories about disasters they had experienced after induction.
And you know what?
I believe those stories.
But I also think farrowing itself can be a disaster—with or without induction. When something goes wrong, it's human nature to blame the last thing we did. Temporal association is an easy target.
With that in mind, we decided to experiment. We stepped away from our normal induction protocol and let this season's sows and gilts write more of their own schedule.
Three observations stood out enough that I wrote them down.
𝗙𝗶𝗿𝘀𝘁: Natural labor did not eliminate problems.
We still had an occasional stillborn piglet. We still saw breech presentations. Some first- and second-parity mothers that were difficult the first time around were still difficult this time and still attempted to savage piglets. We still had to assist some of the old girls.
Mother Nature is good.
She is not perfect.
𝗦𝗲𝗰𝗼𝗻𝗱: Once our naturally farrowing females developed vulvar discharge, many of them seemed to transition into active labor surprisingly quickly.
In some of our induced litters over the years, it has occasionally felt like there was more waiting between those first subtle signs and pigs actually hitting the ground. I can't tell you that's a universal truth or anything more than an observation from our own farm, but it was noticeable enough that I wrote it down.
𝗧𝗵𝗶𝗿𝗱: We were delivering a whole lot more pigs at 2 a.m.
Turns out when you let sows make the schedule… they don't check your calendar first.
And that brings me to perhaps the biggest takeaway.
𝘐𝘧 𝘐 𝘩𝘢𝘷𝘦 𝘢 𝘧𝘦𝘮𝘢𝘭𝘦 𝘵𝘩𝘢𝘵 𝘐'𝘮 𝘦𝘷𝘦𝘯 𝘳𝘦𝘮𝘰𝘵𝘦𝘭𝘺 𝘤𝘰𝘯𝘤𝘦𝘳𝘯𝘦𝘥 𝘤𝘰𝘶𝘭𝘥 𝘦𝘯𝘥 𝘶𝘱 𝘯𝘦𝘦𝘥𝘪𝘯𝘨 𝘢 𝘊-𝘴𝘦𝘤𝘵𝘪𝘰𝘯, 𝘐'𝘮 𝘱𝘶𝘵𝘵𝘪𝘯𝘨 𝘩𝘦𝘳 𝘰𝘯 𝘮𝘺 𝘴𝘤𝘩𝘦𝘥𝘶𝘭𝘦—𝘯𝘰𝘵 𝘩𝘦𝘳𝘴.
I'd much rather induce her, have the truck fueled, the supplies ready, and extra eyes available than have her decide to begin labor at 3 a.m. while everyone is exhausted from farrowing week.
Don't ask me how I know.
One other point that's worth mentioning: not all induction protocols are created equal.
Many producers who have sworn off induction describe experiences that sound remarkably similar to what we encountered years ago using Lutalyse. In our own side-by-side experience, we have consistently preferred Estrumate. Subjectively, the transition into labor has often seemed gentler and more orderly, making it our induction protocol of choice when we elect to induce.
For those curious, here's what that has looked like on our farm:
📌 𝗢𝘂𝗿 𝘀𝘁𝗮𝗻𝗱𝗮𝗿𝗱 𝗳𝗮𝗿𝗿𝗼𝘄𝗶𝗻𝗴 𝗶𝗻𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗽𝗿𝗼𝘁𝗼𝗰𝗼𝗹
💉𝗠𝗲𝗱𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Estrumate® (cloprostenol)
📅 𝗧𝗶𝗺𝗶𝗻𝗴: Approximately Day 113 of gestation
🐽 𝗔𝗱𝗺𝗶𝗻𝗶𝘀𝘁𝗿𝗮𝘁𝗶𝗼𝗻: 1 mL injected into the perivulvar tissue
⏰ 𝗪𝗵𝗮𝘁 𝘄𝗲 𝘁𝘆𝗽𝗶𝗰𝗮𝗹𝗹𝘆 𝗲𝘅𝗽𝗲𝗰𝘁: Piglets generally begin arriving within 24–36 hours, although females that are already bagged up, producing milk, and clearly on the verge of labor may begin within just a few hours.
⚠️ Important: Estrumate is a prescription medication, and its use for farrowing induction in swine is off-label. This protocol should only be undertaken under the guidance of a licensed veterinarian within a valid veterinarian-client-patient relationship.
The older I get as a veterinarian—and as a human—the less interested I become in absolutes.
I don't think induction is inherently superior.
I certainly don't think it's inherently inferior.
As we say so often in medicine:
"What's the best option?"
"It depends."
Induction is a tool.
For an older sow I trust with her piglets—and on a night when I'm rested and able to monitor her closely—I still think letting Mother Nature take her course can be an excellent option.
But there are absolutely situations where controlling the timeline may change outcomes for the better.
As always, I hope sharing what we've experienced and learned helps someone else, in partnership with their veterinarian, make the best decision for their own herd.
– Dr. Jett Eder