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Asked by Sianny

Q: Due Dates

Every calculator online I have used including the official NHS one says I'm due 2nd of January 2015 but my midwife is insistent that I'm due 4th of Jan because she used maths...
I know this is not a big difference but what id like to know is why is this different seeing as it's all based on 28day cycle, am I and the calculators wrong or is it my rather annoying midwife?

This question was asked May. 23, 2014 11:44am
Category: Labour & Delivery

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Answers (11)

Answered by Sianny - May. 26, 2014 7:05am

Maggie I never said it mattered in fact if you actually read you will see I said im not concerned but was wondering if anyone actually knew the math behind the nhs calculations. But thank you for your extremely unhelpful and snotty remark which next time I think you should keep to yourself.

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Answered by maggie22 - May. 26, 2014 5:38am

2 days is nothing, I really don't see why all this matters...?

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Answered by mrsamanda - May. 24, 2014 8:03pm

As long as baby is growing and measuring within 2 weeks of what your gestational age should be, everything is fine. :) Your bub is going to come healthy and beautiful, no matter what Due date you go by. :)

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Answered by Sianny - May. 23, 2014 6:52pm

So confusing, as we are moving I get a new midwife so I will ask her when I see her how it's worked out. Mind you they will probably change my dates at the 12wk scan as I know I wasn't on a 28 day cycle again this time :)

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Answered by jennavee - May. 23, 2014 5:51pm

It would depend on what method she's using to calculate it. Usually it's a formula, maybe she has a different one?

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Answered by Sianny - May. 23, 2014 3:22pm

Thanks ladies. This is using LMP though of 28th of march I get the 2nd and she says the 4th. It's not a big enough difference to cause any issues but I was wondering why it was different for instance what is the math behind this calculation.

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Answered by eag923 - May. 23, 2014 2:33pm

The OB I used with my first child calculated my due date by my first ultrasound. If you went by my LMP I was due 7/4, but u/s put it at 7/6 (which made sense bc I had 31 day cycles). My Dr with baby #2 used LMP even though u/s put me further ahead (that made sense too bc with baby #2 I had 27 day cycles). In the end, a few days makes little difference as so few babies are born on their actual due date.

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Answered by mrsamanda - May. 23, 2014 1:47pm

I go by LMP and so does my doctor, so we have been on the same page the whole time. I wouldn't worry too much though. It's only a couple days. In the end, those couple of days probably won't even make a difference.

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Answered by hopejosh - May. 23, 2014 1:08pm

My midwife goes by LMP as well. Some of the calculators I've used are a day or so different. But a day or two isn't really going to matter much.

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Answered by ellsbells71 - May. 23, 2014 12:18pm

I always go from DPO roughly speaking as I have a longer cycle than a 28 day and the NHS refuses to acknowledge that this is the case and everything has to be text book, they are always a good week out where my own calculations are usually just a few days either way. xx

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