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Herd Health & Disease ManagementRetained Placenta: Causes and Follow-Up
A retained placenta is one of the most common fresh-cow problems, and it often opens the door to other trouble. Knowing the causes and the follow-up helps you act early and keep the herd's numbers down.
Key points
- A retained placenta can lead to infection, lost milk and slower rebreeding.
- Do not pull on hanging membranes; call your veterinarian.
- Causes overlap, so look at calving help, ration, minerals and cow condition together.
- Keep records of every case and review them with your vet.
- Follow all label or vet-set withdrawal times after any treatment.
What a retained placenta is
After a calf is born, the cow normally passes the afterbirth within a number of hours. When the membranes stay in the cow well beyond that, the cow is said to have a retained placenta. Your veterinarian can tell you the cutoff they use for your herd.
It is not a trivial problem. Retained membranes can lead to a uterine infection, a drop in appetite and milk, and slower return to breeding. Some cows show little else, while others go off feed quickly.
Because the signs can be subtle, the safest habit is to look at every fresh cow every day for the first several days and write down who has passed the afterbirth and who has not.
Known risk factors
No single cause explains every case. Several things raise the odds, and many are tied to the management of the late dry period and the calving pen.
Because causes overlap, the useful question for a herd is not why this one cow, but what do the affected cows have in common.
- Difficult or assisted calvings
- Twins or stillbirths
- Calving too early or abortions
- Low blood calcium and other fresh-cow metabolic problems
- Dry-cow ration issues, including mineral and vitamin balance
- Overconditioned or underconditioned cows
- Stress, heat or crowding before calving
- Infectious causes your vet may test for
Recognizing it in the pen
Often you will see membranes hanging from the vulva a day or more after calving. Sometimes nothing hangs out, and the cow is simply dull, eating less and making less milk. A fresh-cow check that includes appetite, temperature if your vet has taught you how, and discharge catches both.
Do not pull on hanging membranes. Forcing them can injure the cow and make things worse. Let your veterinarian decide what to do.
A cow with a retained placenta may still look fairly normal on the first day. That is one reason a written check matters: a quiet cow that is slightly slower at the bunk is easy to miss in a busy pen.
- Membranes visible past the expected time
- Foul-smelling discharge
- Drop in feed intake or milk
- Dull attitude, fever, or reluctance to move
What follow-up looks like
Treatment of a retained placenta is a veterinary decision. Practices differ, and the right approach depends on the cow's condition, your herd's protocols and any certification programs you are in. This guide does not describe treatments.
What you can do is get the cow seen promptly, keep her comfortable, watch her intake and milk, and follow every instruction on the farm treatment plan. If any medication is given, milk and meat withdrawal times on the label or set by your vet must be followed exactly, and the cow's milk must be handled as directed.
- Mark the cow and tell everyone on the crew
- Record calving date, cow ID and the finding
- Follow the vet's plan for rechecks
- Keep withdrawal dates visible on the pen card
Prevention through management
Prevention focuses on the things you can control. Keep the maternity pen clean and dry. Keep cows calm and well fed in the weeks before calving. Handle assisted calvings cleanly and gently, with clean hands and equipment, and with training for anyone who helps.
Work with your nutritionist to review the dry-cow ration and mineral program. Ask whether your herd is meeting its calcium, energy and body condition goals before calving.
- Review calving help procedures with staff
- Wash and disinfect equipment between uses
- Check the close-up ration against the lab results
- Reduce crowding and heat stress
Herd records and what to ask your vet
A single case is a cow problem. Several cases in a month are a herd problem. Track how many fresh cows are affected, and note the season, pen, calving ease and ration for each. Compare your rate with what your vet considers acceptable for your herd.
Bring that list to your herd health visit and ask what the pattern suggests.
- What is our rate, and what should it be?
- Do assisted calvings or twins explain it?
- Should we test forages or blood?
- Is our calving routine clean enough?
Common mistakes
Pulling the membranes by hand, delaying a vet call because the cow is still eating, and failing to track cases are the usual errors. Another is blaming one cause and ignoring the rest. Most herds improve by making many small corrections, not one big change.
Sources and further reading
- University of Wisconsin-Madison Extension
- Cornell CALS PRO-DAIRY
- American Association of Bovine Practitioners
- Penn State Extension
Organization homepages are linked so you can search them for current guidance on this topic.