Surrogacy due date calculator.
For intended parents and gestational carriers: not just a birthday estimate — a transfer-to-birth plan with the dependencies that actually move the date.
Planning aid for family building — not medical, legal, or tax advice, and not a clinical opinion for your case.
A surrogacy due date is calculated from the embryo transfer date — a day-5 transfer plus 261 days — and for intended parents it anchors travel booking, insurance timing, and the pre-birth order schedule more than day-to-day pregnancy tracking.
What intended parents actually do with the due date.
In a surrogacy journey, the estimated due date is less a countdown and more a scheduling anchor. Three plans hang off it from the week the transfer is confirmed.
Plan a window, not a date. The timeline marks a travel-planning stretch across the last month before the estimated date; many intended parents hold refundable stays near the delivery hospital for that stretch instead of betting on the date itself.
The delivery window drives when the surrogate’s coverage gets its final review and when newborn coverage decisions need to be settled. The planner carries an insurance-review dependency so this surfaces early — not for the first time in the third trimester.
Parentage paperwork runs on state law, not on gestation alone. Some states start pre-birth orders in the second trimester; others handle parentage closer to or after delivery. See how states differ in our surrogacy laws and policies hub.
Who tracks what.
A good match splits the calendar cleanly. Your surrogate and her care team own the medical layer — appointments, betas, scans, and any dating adjustment her OB makes. Intended parents own the coordination layer the tool models: legal clearance, escrow funding, insurance review, and travel. Many matches also agree up front which milestones get shared and how quickly — a beta call the same day, scan photos after the appointment — so nobody is refreshing a group chat wondering.
The exportable calendar helps here: both sides can carry the same milestone dates without anyone forwarding medical records. Save the result to your on-device Journey Passport and the dates follow you across the other planning tools.
Intended-parent FAQ.
Who keeps track of the due date — the intended parents or the surrogate?
Both, on different layers. Your surrogate and her care team own the medical calendar: appointments, results, and any dating adjustments from ultrasound. Intended parents own the logistics keyed to that date — legal deadlines, insurance timing, and travel. Most matches also lean on the agency to keep everyone working from the same dates.
When should intended parents book travel for the birth?
Plan a flexible window rather than a single date. The timeline marks a travel-planning stretch in the final month before the estimated date; many intended parents hold refundable bookings near the delivery hospital across those weeks. Set the final plan with your surrogate, your agency, and the delivery team — first babies and multiples can shift it.
Does the due date decide when the pre-birth order is filed?
It is one input, not the deadline. Parentage timing is set by state law and attorney practice: some states begin pre-birth order work in the second trimester, while others establish parentage closer to or after delivery. Your surrogacy attorney will map the estimated due date onto your state’s actual filing window.