Due Date Calculator Added

Hesaplayıcı has a new due date calculator. It finds your estimated due date from the first day of your last period and your cycle length. It also works from a conception date or the day of an IVF embryo transfer. It shows how many weeks pregnant you are on a day you choose, the trimester and the estimated conception date.

What changed

• New tool: the due date calculator, with three methods: last period, conception date and IVF transfer.
• The rules are from ACOG Committee Opinion 700; the cycle length counts as in the NHS due date calculator.
• New guide: how a due date is calculated, with pregnancy weeks and trimesters.
• New glossary term: gestational age.
• As with every tool, it also runs through the REST API and MCP.

Effect on calculations

Example: someone whose last period started on 1 January 2026, with a 28-day cycle, has an estimated due date of 8 October 2026. On 1 June 2026 the pregnancy is 21 weeks 4 days, in the 2nd trimester. You can find your own date with the due date calculator. A date from an ultrasound comes before this estimate.