Pregnancy Due Date Calculator for Twins

Twin pregnancies follow the same 40-week calendar as singletons, but most twin births happen earlier — the median for dichorionic-diamniotic twins is around 37–38 weeks, and for monochorionic twins even sooner. Use this tool to calculate your baseline EDD from your LMP, then discuss with your OB or midwife how your specific twin type (identical vs fraternal, shared vs separate placentas) may shift your target delivery window. Closer monitoring, earlier anatomy scans, and more frequent third-trimester appointments are typical for twin pregnancies.