When to Take a Pregnancy Test: Timing & Accuracy

For the most reliable result, wait at least 1 week after your missed period before testing. This allows hCG to reach detectable levels in urine.

Why Timing Matters

• hCG doubles every ~48 hours after implantation.
• Testing too early → false negative (hCG below threshold).
• Standard tests detect ~20–25 mIU/mL; early-result tests detect ~10 mIU/mL.

Options for Earlier Testing

• Sensitive Urine Tests: Can detect ~6 days before missed period (but higher false-negative rate).
• Quantitative Blood Test (β-hCG): Detects pregnancy 7–10 days post-ovulation; measures exact level, monitors viability.

Best Practices

• Use first-morning urine (most concentrated).
• Follow instructions precisely.
• Check expiration date.
• If negative but period absent, retest in 3–5 days.
• Positive result → contact provider for prenatal care.

Even sensitive tests are more accurate after a missed period. Patience improves reliability.