Cow Retained Placenta: Causes, When to Worry & What to Do

A retained placenta, also called retained fetal membranes, means the placenta has not been expelled within about 24 hours after calving. In many cows, the placenta normally passes much sooner, often within 3 to 8 hours. Dairy cows are affected more often than beef cows. Risk rises when the normal separation between the placenta and uterus does not happen well after birth.

Common triggers include dystocia, twin birth, stillbirth, abortion, premature birth, induced parturition, placentitis, and hypocalcemia. Difficult calving matters because trauma, swelling, and stress around delivery can interfere with normal placental release. Abortions and premature births are especially important because the placenta may not be mature enough to detach normally.

Nutrition and transition-cow health also play a role. Low energy or protein intake, poor body condition, obesity, and deficiencies in selenium, vitamin E, vitamin A, or iodine have all been linked with higher risk. Herd-level stressors such as heat stress and poor maternity hygiene can add to the problem.

Infectious disease can be part of the picture too, especially when abortion is involved. If several cows in a herd retain placentas, abort, or develop uterine infections around the same time, your vet may want to investigate herd nutrition, mineral balance, calving management, and infectious causes rather than treating it as a one-cow problem.

See your vet immediately if the placenta is still present at 24 hours after calving, even if the cow seems fairly normal. Retained placenta is not always a collapse-level emergency in the first day, but it does deserve prompt veterinary guidance because the risk of metritis and other fresh-cow problems goes up quickly.

Urgent red flags include fever, depression, reduced appetite, decreased water intake, weakness, foul-smelling uterine discharge, rapid weight loss, dehydration, or a drop in milk production. A cow that is down, toxic, or not interested in feed needs same-day care. Severe infection can progress to toxemia and become life-threatening.

Short-term monitoring at home may be reasonable only after you have spoken with your vet and the cow is bright, eating, drinking, and showing no systemic illness. Even then, close observation matters. Check appetite, attitude, manure, hydration, milk production if relevant, and the smell and amount of discharge at least daily.

Do not pull on the hanging membranes. If they are very long and dragging in manure, your vet may advise trimming the contaminated portion, but forceful removal is not recommended. Many untreated cows will pass the membranes naturally over 2 to 11 days, so the key question is not whether tissue is still visible, but whether the cow is staying clinically well.

Your vet will start with a fresh-cow exam and history. That usually includes checking temperature, hydration, appetite, attitude, uterine discharge, and whether membranes are protruding or retained internally. If the placenta is not visible, a vaginal exam may help confirm whether tissue is still in the cervix, vagina, or uterus.

Treatment depends on whether the cow is sick or stable. In a bright cow without fever or toxemia, your vet may recommend monitoring, hygiene, and follow-up rather than aggressive intervention. Manual removal is generally avoided because it can injure the uterus and may reduce future fertility. Routine intrauterine antibiotics are also not considered helpful in uncomplicated cases.

If the cow has systemic illness, your vet may treat for metritis or toxemia with systemic antibiotics and supportive care. Depending on the case, that can include anti-inflammatory medication, fluids, energy support, and treatment for related fresh-cow problems such as ketosis or hypocalcemia. In more severe metritis cases, supportive care may include IV dextrose and hypertonic saline along with ready access to water.

If retained placentas are happening repeatedly in the herd, your vet may step back and look at prevention. That can include reviewing calving difficulty, abortion history, mineral program, selenium and vitamin E status, body condition at calving, heat stress, and maternity-pen cleanliness.

Home care starts with a clean, low-stress environment and close observation. Keep the cow in a dry, reasonably clean area with easy access to fresh water, good-quality feed, and footing that reduces slipping. Watch appetite, cud chewing, manure output, attitude, and milk production if she is lactating.

Do not pull on the placenta. That can tear tissue and increase uterine damage. If membranes are dragging in manure or mud, call your vet for guidance. In some cases, the visibly contaminated end can be shortened, but the retained portion should not be forcefully removed.

Take the cow's temperature if you are able to do so safely and your vet has shown you how. A foul smell, fever, reduced feed intake, sunken eyes, weakness, or a sudden drop in production means the plan should change quickly. Follow all prescription directions exactly, including withdrawal times for meat or milk.

Longer term, prevention matters. Work with your vet and nutrition team on calving management, body condition targets, mineral balance, and transition-cow nutrition. Herds with repeated cases may benefit from reviewing selenium and vitamin E status, abortion history, dystocia rates, and maternity-pen hygiene.