What are the common symptoms of subinvolution of placental sites?

Common signs include postpartum vaginal bleeding or blood-tinged discharge, fever, lethargy, and decreased appetite. The mother's nursing behaviour may also change. Seek immediate veterinary care if there is heavy bleeding or difficulty breathing.

How does the vet check for subinvolution of placental sites?

The vet will begin with a physical examination and typically recommend blood and biochemistry tests. Abdominal ultrasound is commonly used to assess whether retained tissue or fluid is present in the uterus. Bacterial culture may be performed if infection is suspected.

What can I prepare at home to speed up the appointment?

Record when bleeding started, its amount and colour, and photograph or video the discharge. Have a list of recent medications, vaccination history, and notes on the mother's diet and elimination habits ready for the vet.

How long does follow-up care take after treatment?

Follow-up duration depends on the individual case. Repeat blood tests or cultures are usually required as directed by the vet until infection is controlled, bleeding has stopped, and the mother's demeanour and nursing have returned to normal.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Subinvolution of Placental Sites in Dogs & Cats: Postpartum Bleeding, Ultrasound & Care Guide [2025]

Incomplete uterine recovery after birth causing postpartum bleeding, often self-resolving

Take 1 minute to check the symptoms first

Last updated: 2026/01/06

Pethealthmap editorial team

Sources: WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Immediate veterinary care needed (emergency)

•Persistent heavy vaginal bleeding that cannot be stopped
•Prolonged lethargy with very poor responsiveness
•Rapid breathing, open-mouth panting, or labored breathing

Schedule a veterinary visit as soon as possible (within 24-72 hours)

•Persistent mild vaginal bleeding after giving birth, or bleeding that is not improving in color
•Marked decrease in appetite with low energy for more than one day
•Foul-smelling vulvar discharge or passage of blood clots

01What Symptoms Indicate Something Is Wrong?

Subinvolution of placental sites (retained uterine tissue after birth) commonly causes postpartum vaginal bleeding and signs of infection; the mother's demeanour and nursing behaviour may also be affected.

Persistent or increasing vaginal bleeding after birth
Foul-smelling vaginal discharge or passage of blood clots
The mother appears lethargic with reduced activity and decreased appetite
Elevated body temperature or localised warmth on palpation
Changes in nursing behaviour — refusing to feed pups/kittens or abnormal interaction with them
If bleeding increases, arrange a vet visit promptly

Seek emergency care immediately if you notice the following symptoms:

⚠️ Heavy vaginal bleeding that cannot be controlled
⚠️ Prolonged drowsiness with very slow or unresponsive reactions
⚠️ Rapid breathing, open-mouth panting, or laboured breathing

02What Should You Do When Something Seems Wrong? Home Observation Tips and Emergency Decision Criteria

Systematic observation and records at home help your vet understand the situation quickly and make informed decisions.

Record when bleeding started, the amount, and any changes in colour
Photograph or video the discharge and vulval area as evidence
Take the mother's temperature daily and note the time and method used
Track appetite, water intake, and the frequency and nature of urination and defecation
Observe the mother's interaction with her young and nursing behaviour
If anything seems abnormal, bring photos or videos and arrange a specialist appointment as soon as possible

03How Will the Vet Diagnose This? Common Diagnostic Tests

At the clinic, the vet will combine the patient history with the following tests to determine whether retained tissue or infection is present and to plan the next steps.

Physical examination

assess the source of bleeding, abdominal tenderness, and uterine size

Complete blood count

monitor white blood cell count, inflammatory markers, and signs of anaemia

Biochemistry panel

evaluate liver, kidney, and other vital organ function

Urinalysis

assess for systemic infection or dehydration

Bacterial culture and sensitivity

identify the causative organism and guide treatment choices

Abdominal ultrasound

check for retained tissue or fluid accumulation within the uterus

04How Should the Pet Be Treated and Cared for After the Appointment? Medication, Dietary Adjustments & Care Guide

After treatment, regular follow-up appointments and home monitoring are needed to confirm that bleeding is decreasing, infection is controlled, and the mother has returned to normal activity and nursing.

Complete the full course of medication as prescribed and attend all scheduled follow-up appointments
Return regularly for blood tests or cultures to confirm infection is under control
Monitor whether bleeding is gradually reducing and whether appetite and demeanour are improving
Avoid vigorous activity at home; keep the vulval area clean and dry
If bleeding or concerns about infection persist, consider a specialist referral or surgical evaluation

05What Should You Prepare Before the Vet Visit? Key Information to Help Your Vet Quickly Identify the Problem

Record when symptoms started and how they have progressed to share with the vet

List any recent medications, supplements, and vaccination history

Take photos and videos of the discharge and the mother's activity level for reference

Bring a brief record of the mother's diet and elimination habits

Book in advance at a clinic equipped for ultrasound and laboratory testing

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.