Tina Congrats DD2 was due NYE last year so you are exactly a year behind.
Tina Congrats DD2 was due NYE last year so you are exactly a year behind.
A number of CRL reference charts have been proposed and different versions are in common use (Table 1).All charts generated dates significantly different to IVF dates ( all comparisons).Thus we generated a new reference chart, The Monash Chart, based on a line of best fit describing crown-rump length across 6 1 to 9 0 weeks of gestation (true gestational age) in the IVF singleton cohort.These were identified from a total cohort of 4971 first trimester ultrasound reports of IVF and naturally conceived pregnancy scans.Pregnancies that resulted from frozen embryos transfer, complicated by fetal structural anomalies, delivered before 24 weeks, or had missing data were all excluded.Should I be concerned or is it likely that because the baby is so small that a tiny error could change the dates by a few days?? I did have a successful IVF in 2011 and I had my early scan at 7 weeks 5 days and the baby measured maybe 2 days behind.That baby is now 2.5 and sleeping in bed Thanks for any support and advice Edited by Tardis Angels, - PM. My dd was only a day 3 & measured 6 days behind at the first scan @ 6w2d.In the first trimester, there is a very little biologic variation in fetal size compared with later trimesters.It is therefore a good time in pregnancy to determine gestational age by ultrasound where the crown-rump length (CRL) is measured and compared to published reference charts.It should be possible to generate very accurate reference charts by using a large in vitro fertilisation (IVF) cohort where CRL measurements could be correlated with gestational age precisely calculated from date of fertilisation.Accuracy could be further enhanced by using measurements obtained from high-resolution transvaginal scans by sonologists specialising in Women’s Health.
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