Dates??? Help!

Hi Everyone,

I'm a bit confused with my dates. Some comments would be helpful.

16 March - go off pill
23 April - VFP
24 April - Bleeding and cramping
25 April - HCG tests showing 2 so doc said early m/c
Pgcy symptoms continue to get worse

Last week May - BFP
6 June - Scan dates us at 5 weeks 4 days approx (are these accurate??)
20 week scan shows conception date at 21 April
Baby now measuring 2-3 weeks ahead of dates

The thing that is confusing me is that even if 21st April is an approximate, I was have a m/c around that time and DH and I didn't have sex for a good few weeks after.


So, did I not loose the first baby and am actually over 30 weeks, or did I loose the baby and my dates are up the muck??

I'm so confused.


Edited by Danaj

My understanding is the earlier the scan the more accurate it is. Therefore in your position I would go with the EDD they gave you at the scan when they had you measuring 5 weeks 4 days.

Have you talked to your midwife about it? With Spencer my midwife thought I felt a couple of weeks further along so she double checked the dates given at the 12 week scan (I was unsure of my lmp) and was happy to go by that. I then ended up having a growth scan at 35 weeks (for other reasons) and he didn't measure ahead at that so I might have just either had a lot of fluid or perhaps cos they missed he was breech that made me feel bigger?

If you did concieve on the 21st April then your HCG levels on the 25th April at 4 days past conception are probably about right (I think at that time they should be somewhere between 0-50) but then that doesn't explain how you got a VFP on the 23rd April as even the most sensitive tests only measure HCG levels about 15-25. 

It is possible (although unlikely) to release 2 eggs during your cycle so there's a chance that there were two fertilised eggs, one earlier that miscarried and one slightly later that implanted but that's a stab in the dark really.

I'd just go with the original scan too and as nzpiper said this baby will come when he/she is ready.

Scans that are done 10 weeks and below are accurate by +/- 1 day. So the scan that you had that showed you at 5 weeks 4 days is the one you go by for your EDD.

Any scans after 10 weeks are inaccurate, as this is when genetic and environmental factors come into play in regards to the size of the baby. For example, I knew when I had my LMP and when I ovulated, so when I had my dating scan at 8 weeks 5 days, I measured at that date exactly.

However, when I went for my nuchal scan at 12 weeks 4 days, the baby was measuring 2 weeks ahead

So I would only go by what you measured at your dating scan, not anatomy scan. Even at my anatomy scan, my baby was measuring nearly 3 weeks ahead, but I know that is just due to genetics.
.

pomikiwi wrote: It's so confusing! What did they do before scans came along!

They thought my mum was a month ahead with my brother so when she was 8 months they took a sample of her amniotic fluid and tested it. Turns out she was right, she was just carrying a huge amount of water that made it seem like she was further ahead.

cuppatea wrote: pomikiwi wrote: It's so confusing! What did they do before scans came along! They thought my mum was a month ahead .....

 

They thought my mum was a month ahead too but she knew exactly when she concieved and completely ignored the docs EDD (which came and went a month before my big sis was born).  She just carried big, I'm guessing that's where I get it from.

I suppose before scans babys were just born when they were ready, without people telling them when they were supposed to be!

I agree with the later scan dates being inaccurate. I had a scan at 38wks, baby was only measuring about 34-36 wks, but I went into labour the next day...