Skip to content
Pregnancy Chance Calculator
  • Our Calculators & Tools
    • Advanced Pregnancy Chance Calculator
    • One-Time Pregnancy Calculator
    • Pregnancy Chance Calendar
    • hCG Doubling Time Calculator
    • Conception Date Calculator
    • Implantation Calculator
    • Chance of Twins Calculator
    • All Calculators→
  • About Us
  • Legal
    • Privacy Policy
    • Terms of Use
    • Health Disclaimer

Prenatal Testing Timeline and Results-Date Calculator

July 14, 2026July 14, 2026 by Sam Gorman

Turn an estimated due date into US timing windows and result dates for common prenatal screening and diagnostic tests.

Categories Tools

Pregnancy Announcement Risk-by-Date Calculator

July 19, 2026July 14, 2026 by Sam Gorman

Compare estimated miscarriage risk now with the risk at a future gestational week to help choose an announcement date.

Categories Tools

Residual hCG or New Pregnancy Calculator

July 14, 2026July 14, 2026 by Sam Gorman

Compare two quantitative hCG results to see whether the pattern better fits falling residual hCG or new hCG production.

Categories Tools

Birth Control Switch Protection-Gap Calculator

July 14, 2026July 14, 2026 by Sam Gorman

Find how many days of backup protection may be needed when starting or switching birth control under current US CDC rules.

Categories Tools

Can Ultrasound Tell Who the Father Is? Calculator

July 14, 2026July 14, 2026 by Sam Gorman

Compare two intercourse dates with an ultrasound-based conception window to see whether timing favors one possible father.

Categories Tools

Early Ultrasound Visibility and Best Scan Date Calculator

July 19, 2026July 14, 2026 by Sam Gorman

Estimate gestational-sac or yolk-sac visibility on transvaginal ultrasound and a possible scan date from an hCG trend.

Categories Tools

Vanishing Twin NIPT Timing Calculator

July 19, 2026July 14, 2026 by Sam Gorman

Estimate vanishing-twin interference concern for an NIPT blood draw using timing, gestational age, and ultrasound type.

Categories Tools

NIPT Redraw Success and Best Date Calculator

July 19, 2026July 14, 2026 by Sam Gorman

Estimate the chance that an NIPT redraw will return a result after a low-fetal-fraction no-call and find the first study-based redraw date.

Categories Tools

CVS or Amniocentesis After NIPT: Risk and Diagnostic-Yield Calculator

July 12, 2026July 12, 2026 by Sam Gorman

Estimate procedure-related loss risk and the chance standard testing finds a missed trisomy after low-risk NIPT.

Categories Tools

Live Birth and Chromosome Risk Calculator

July 19, 2026July 12, 2026 by Sam Gorman

Estimate live-birth outcomes without trisomy 21, trisomy 18, or trisomy 13 before NIPT or after a screening result.

Categories Tools
Older posts
Page1 Page2 … Page13 Next →
CALCULATORS

Pregnancy Chance Calculator

Pregnancy Chance Calendar

One-Time Pregnancy Chance

Advanced Pregnancy Chance

hCG Doubling Time Calculator

Miscarriage Risk Calculator

Implantation Calculator

Conception Date Calculator

Twin and Triplet Due Date

IUI Due Date

Due Date from Intercourse or Conception

See all calculators →

COMPANY

About Us

Contact Us

Editorial Policy

RESOURCES

How it Works

Data Sources

Privacy Policy

Terms of Use

Health Disclaimer

Advertiser disclosure: PregnancyChanceCalculator.com is an independent, advertising-supported calculator site. Display ads are served by partners such as Mediavine. We may earn revenue from ads or referral links where noted. Advertising does not influence our calculators or editorial content.

About these calculators: Our tools provide estimates based on published research and population-level data. Results are illustrative and may not reflect your individual circumstances. They are not medical advice. Read our Health Disclaimer and the "Methodology and sources" section on each tool for assumptions and limitations.

© 2026 Pregnancy Chance Calculator. All Rights Reserved