Ultrasound dating of pregnancy


20-Oct-2019 16:19

Assessing gestational age by ultrasound can introduce a systematic bias due to sex differences in early growth.This cohort study included data on 1,314,602 births recorded in the Swedish Medical Birth Register.After changing the pregnancy dating method, male infants born early term had, in relation to female infants, higher odds for pneumothorax (Cohort ratio [CR] 2.05; 95 % confidence interval [CI] 1.33–3.16), respiratory distress syndrome of the newborn (CR 1.99; 95 % CI 1.33–2.98), low Apgar score (CR 1.26; 5 % CI 1.08–1.47), and hyperbilirubinemia (CR 1.12; 95 % CI 1.06–1.19), when outcome was compared between the two time periods.

Up to 1978, practically all clinics were using the LMP date in order to calculate the EDD.Misclassification of gestational age by ultrasound, due to size differences, can partially explain currently reported sex differences in early term and late preterm infants’ adverse neonatal outcomes, and should be taken into account in clinical decisions and when interpreting study results related to fetal sex.The use of ultrasound (US) has an unquestionable role in modern obstetrical practice.With the introduction of US in Sweden, the practice was changed to estimate the EDD from second-trimester US biometry irrespective of the LMP date [1].

ultrasound dating of pregnancy-65

Sex chatting in kannada wap

Before 1980, fewer than 5 % of hospitals practiced US scanning.The risk estimates, by fetal sex, that were generated for each of the two time periods were then compared.



Use water-resistant sunscreen if it's likely you'll sweat or have contact with water.… continue reading »


Read more

This website uses cookies to enhance user navigation and to collect statistical data.… continue reading »


Read more

You will find some of the most incredible free porn cams anywhere online across our platform with features such as cam to cam shows, dirty video chat, and much more without even requiring registration. Our platform is so simple to use that you can start enjoying free nude cams in just a couple of clicks.… continue reading »


Read more

Now, are you looking for something more than relationship?… continue reading »


Read more

Consequently, they try harder to please, and you will be the beneficiary of all this trying :-) But what people really want in a mate, the thing that truly makes a relationship last, is a mind-stimulating companion.… continue reading »


Read more

Rather than assuming your last text upset her (or that she must not want to talk to you anymore) assume that your text just got lost in the shuffle.… continue reading »


Read more

But let’s be careful not to romanticize romance in the days before we did this.… continue reading »


Read more