Compare sex dates with an early ultrasound dating range. See overlapping partner timelines without treating conception dates as proof of paternity.

Check the test names on your STI report. See which infections you recorded, what sample sites mean and what to ask before relying on a full panel.

Plan waiting and repeat-testing dates after chlamydia, gonorrhea or trichomoniasis treatment. Check partner-treatment and symptom conditions.

Compare a negative STI test with several exposure dates. Check test windows, later encounters and sample sites without treating a result as a guarantee.

Compare sex dates with a Plan B or ella dose. Check later-sex guidance, hormonal birth control restart timing and pregnancy-test planning dates.

Enter several sex dates to see when to take a pregnancy test and whether an earlier negative result was too soon for each encounter.

Calculate your menstrual cycle length from period start dates. See each cycle’s length, your average, and the shortest-to-longest range.

Explore parental-age estimates for Down syndrome, Edwards syndrome, autism and miscarriage, with context for other pregnancy and child health outcomes.

Assess what abortion history, recovery, age, and known fertility factors can and cannot tell you about future fertility, with a separate cohort benchmark.

Estimate population-based complication benchmarks for one or more future abortion types, including serious complications, mortality, treatment, infection, and fertility context.