Could someone help me calculate IVF due date?

(6 Posts)
PSL1990 Tue 27-Aug-19 19:07:31

Sorry to post this here but I need IVF knowledge if anyone could help.

I had a 5 day blasto transferred on July 2 and got a BFP. What should my due date be?

The reason I ask is because I'm measuring significantly ahead but I think my due date might be wrong. It seems unlikely the NHS would get the due date wrong but they have told me it's March 24th. Can anyone confirm this/how it should be calculated?

Thanks v much!

OP’s posts: |
thecalmorchid Tue 27-Aug-19 19:17:13


My due dates for IVF were always very out. Especially if taking suppression medication to coast you until a slot become available to start injections.

The dating scan was the most accurate for my pregnancies. I think that was at around 17 weeks.

My calculations make you due around the19th March 2020. It sounds as though they've calculated your date from embryo transfer and not conception.

PSL1990 Tue 27-Aug-19 19:24:20

@thecalmorchid thank you! That's what I make it too! I should have added - this was a natural FET with no drugs/hormones.

OP’s posts: |
eurochick Tue 27-Aug-19 19:28:17

The nhs got my due date wrong. To get it right you have put in a date for your last period 14 days before egg collection. The due date is based on a cycle of 28 days with ov on day 14 so that's how you fake it.

heresHalloweenagain18 Wed 28-Aug-19 00:04:45



It is very confusing to work out I tried doing it for a family member. The hospital worked it out for their ivf (short protocol 2 day transfer) a week behind from egg collection date. Instead of the last date of period as would normally be the case. Their babybarrived 5 days after the due date.

I came across a couple of websites that have ivf calculators though couldn't find a UK one.

This One is worked out from egg collection
And was In line with what the due date the hospital said

This one is by transfer date

Hopefully they help smile

Blondeshavemorefun Wed 28-Aug-19 23:46:05

I had 5 day July 12 and preg and was due 31 March but was induced

So if you are 10 days ahead of me - I would say 21 March

When do they say ?

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