Complete Step-by-Step Guide to Our Bovine Early Pregnancy Rapid Test Kit (Whole Blood Type)

For dairy farms, beef ranches, and veterinary clinics, accurate early pregnancy diagnosis directly decides your herd’s breeding profit. Waiting 90+ days for ultrasound or rectal palpation wastes feed costs, delays re-breeding of open cows, and cuts your annual calving rate.

Our bovine early pregnancy rapid test kit detects PAG (Pregnancy-Associated Glycoproteins) in whole blood, serum, or plasma samples, delivering reliable results as early as 28 days after artificial insemination or natural mating. No professional lab equipment required—farm staff and veterinarians can finish testing within 20 minutes on-site.

This detailed operation guide covers applicable livestock breeds, sample preparation, full test steps, result judgment, and storage rules to eliminate false positives and inaccurate readings.

1. Basic Application Scope & Detection Timeline

Livestock Type	Earliest Test Day Post Breeding	Minimum Postpartum Test Interval (Prevent False Positives)
Dairy Cow / Beef Cow	28 days	≥85 days
Buffalo	30 days	≥85 days

Key Reminder: Do not test cows within 85 days after calving; residual PAG from the last gestation will trigger false positive signals. All testing must be completed at room temperature (18–28°C).

2. Pre-Test Preparation Rules

2.1 Check Kit Validity

• Fully read the operation manual before testing.

• Confirm the kit is within its expiration date, aluminum foil packaging is intact with no moisture damage.

• Take out test cards, sample diluent, and disposable droppers. Place all supplies on a flat, clean table.

• If blood samples or kits are refrigerated/frozen, restore them to room temperature for 30 minutes before opening.

2.2 Sample Collection & Storage Standard

Two acceptable sample types: EDTA-anticoagulated whole blood, serum/plasma.

Sample Type	Collection & Processing	Short-Term Storage Rules
Whole Blood (EDTA)	Collect blood into an EDTA tube, invert gently 10 times immediately to avoid clotting	Store at 2–8°C, valid within 24 hours; freezing is strictly forbidden
Serum / Plasma	Centrifuge blood at 2000–3000 rpm for 5–15 mins, collect clear supernatant	Seal tightly at 2–8°C, use within 7 days to avoid contamination

3. Full Step-by-Step Test Operation

1. Tear open the aluminum foil bag along the pre-cut line and take out the test card. Use within 1 hour after opening to avoid moisture failure. Place the card flat on the desktop.

2. Shake your blood sample tube vertically over 5 times to mix evenly.

3. Use the disposable dropper to absorb your sample liquid slowly.

4. Add sample liquid into the sample well:

   • Whole blood: 2 drops (~60μL)

   • Serum/Plasma: 1 drop (~30μL)

5. Wait 5 seconds after sample addition, then add matching diluent:

   • Whole blood: 3 drops (~90μL) diluent

   • Serum/Plasma: 4 drops (~120μL) diluent

6. Start the timer right after adding the diluent. Keep the test card stationary without moving.

7. Read results under bright light after 10–20 minutes.

Critical Note: Results read after 20 minutes are invalid and cannot be used as judgment basis.

4. Standard Result Interpretation Chart

4 judgment modes based on Test line (T), Benchmark line (B), and Control line (C):

• Not Pregnant

  T line is invisible or lighter in color than B line. No detectable PAG in blood.

• Indeterminate Result

  T line color equals B line. We recommend re-testing the cow after 7 days for confirmation.

• Pregnant (Positive)

  T line is significantly darker than B line, or T line is clear while B line fades. PAG detected, successful gestation.

• Invalid Test

  No visible C control line. The test card failed; discard and re-test with a new strip.

  

5. Core Advantages of Our Bovine Pregnancy Rapid Test Kit

• Ultra-Early Detection: Test cows at 28 days post-AI, re-breed open cows weeks earlier than traditional detection methods.

• Multiple Sample Compatibility: Works with whole blood, serum, and plasma, flexible for farm sampling habits.

• On-Farm Portable Test: No ultrasound machines or lab centrifuges required for basic screening.

• Low Misjudgment Rate: Strict postpartum test window limits avoid false positives after calving.

• Low Operating Cost: Far cheaper than repeated vet ultrasound visits for large herds.

• Simple Operation: Staff without professional lab training can master the process after one demonstration.

• Stable Storage: Complete kits can be stored long-term under cool, dry conditions, making them easy to stock for seasonal breeding peaks.

6. FAQ

Q1: Can I test cows less than 28 days after breeding?

A: Not recommended. PAG concentration in blood is too low before day 28, leading to false negative results and missed pregnancies.

Q2: Why do I get an indeterminate T-line result?

A: The cow may be in early gestation with low PAG levels, or the sample storage time exceeded the limit. Retest after 7 days for accurate data.

Q3: Can I freeze leftover blood samples for later testing?

A: Whole blood cannot be frozen; serum/plasma freezing will also affect test accuracy. Test samples within the stated storage time frame.

Q4: What causes an invalid test with no C line?

A: Three main reasons: expired test card, exposure to moisture after opening, insufficient sample/diluent added. Use a brand-new test strip to repeat detection.

7. How This Test Improves Your Farm Profit

• Shorten calving intervals: Identify open cows early and re-synchronize heat cycles in advance.

• Cut feed waste: Avoid long-term feeding of non-pregnant cattle.

• Reduce vet service fees: Minimize repeated ultrasound bookings for routine herd screening.

• Optimize breeding plans: Accurate pregnancy data helps you adjust AI and embryo transfer schedules.

Our bovine early pregnancy rapid test kit is an essential diagnostic tool for modern cattle breeding management. With this complete operation guide, your farm team can perform reliable on-site pregnancy screening independently and optimize your herd's reproductive performance.

If you are a dairy/beef farm owner, livestock veterinarian, or artificial insemination lab manager, contact our team to get bulk kit pricing, technical operation videos, and customized breeding diagnostic solutions. We also supply supporting livestock lab equipment, including thermostatic sperm microscopes, programmable semen cooling systems, and semen straw printers for a full-chain breeding lab setup.