Urine Pregnancy Test (UPT)

The laboratory UPT detects hCG at concentrations of 20–25 mIU/mL — typically achievable in urine from the first day of a missed period (approximately 14 days after ovulation). Some women with earlier-than-average implantation may test positive a few days before the missed period. Testing before the missed period increases the risk of a false negative due to insufficient hCG accumulation.

First morning urine is the most concentrated specimen of the day — hCG is most concentrated after the overnight period of no fluid intake and urine accumulation. In very early pregnancy when hCG levels are still low, first morning urine maximises the chance of detecting hCG above the test's detection threshold. Dilute urine from excessive fluid intake can cause a false negative in very early pregnancy.

False positives are rare but possible — causes include: hCG-producing tumours (choriocarcinoma, gestational trophoblastic disease), exogenous hCG injections (used in fertility treatments or in bodybuilding), certain medications, and very rarely laboratory assay interference. False negatives are more common — usually from testing too early, very dilute urine, or ectopic pregnancy (which may produce less hCG than intrauterine pregnancy).

A positive UPT should be followed by: serum beta-hCG (to quantify hCG and confirm a viable pregnancy), transvaginal ultrasound (to confirm intrauterine location — to exclude ectopic pregnancy — and foetal heartbeat typically visible after 6 weeks), and early antenatal care initiation. Contact your gynaecologist promptly, particularly if you experience any abdominal pain, vaginal bleeding, or shoulder tip pain (possible ectopic pregnancy warning signs).

Results are typically available within 2–4 hours of sample receipt and delivered to your email and WhatsApp.

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