{"ok":true,"result":{"slug":"due-date-calculator","name":"Due Date Calculator","summary":"Estimated pregnancy due date (40 weeks) from the last period, conception date or IVF transfer, with milestone dates and the gestational age on a given day.","description":"Estimate a pregnancy due date from the last period, conception date or IVF transfer, with how many weeks along you are, the trimester and key dates.","method":"POST","endpoint":"/api/v1/tools/due-date-calculator","plan":"free","mcpName":"due_date_calculator","input":{"type":"object","additionalProperties":false,"properties":{"method":{"type":"string","description":"lmp: first day of the last menstrual period. conception: conception date. ivf: embryo transfer date.","default":"lmp","enum":["lmp","conception","ivf"],"maxLength":200000},"date":{"type":"string","description":"The LMP, conception or transfer date as YYYY-MM-DD.","maxLength":10},"cycleLength":{"type":"integer","description":"LMP method only: average cycle length in days (20 to 45).","default":28,"minimum":20,"maximum":45},"embryoDays":{"type":"integer","description":"IVF only: embryo age at transfer, 3 or 5 days.","default":5,"minimum":3,"maximum":5},"asOf":{"type":"string","description":"Optional date (YYYY-MM-DD) to report the gestational age and trimester on.","maxLength":10}},"required":["date"]},"example":{"method":"lmp","date":"2026-03-01","asOf":"2026-10-20"},"randomOutput":false,"network":false,"docs":"https://pithlab.com/developers/tools/due-date-calculator","page":"https://pithlab.com/tools/due-date-calculator"}}