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Bbbw woman looking up male Dating accuracy of early ultrasounds lapdance

Name the time in gestation when ultrasound is most accurate 2. Discuss the ACOG recommendations for redating a pregnancy based on trimester. Postgraduate Institute for Medicine PIM requires instructors, planners, managers and other individuals who are in a position to control the content of this activity to disclose any real or apparent conflict of interest COI they may have as related to the content of this activity.

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Throughout my pregnancyI've received two different due dates — one came from my very first ultrasound, when my baby was barely the size of a blueberry, the date that was then subsequently stamped on my record as "the" due date. But then there was a second date, the one that showed up on my next couple of ultrasound scans.

This date was a few days earlier. It's also the date that I prefer, not only because I'm now 38 weeks pregnant and ready to get this baby out, but because it matched the date I'd calculated on my own using information I looked up.

And how much does it really matter? After all, as many moms know, due dates are just educated guesses.

When lmp and ultrasound dates don’t match: when to redate?

Traditionally, estimated due dates are calculated by taking the start date of a woman's last menstrual period and adding a year, subtracting three months and adding seven days, a method known as Naegele's rule. But that method doesn't for irregularities in a woman's menstrual cycle — if she has a longer or shorter cycle than 28 days or any variability with ovulation, for example.

That's why the American College of Obstetricians and Gynecologists recommends doctors use ultrasound measurement in the first trimester to establish an estimated due date. The most accurate way to date a pregnancy is with an ultrasound done between 6 weeks and 8 weeks, 6 days, according to Dr. As a woman's pregnancy progresses, fetuses develop at different rates, which is why an estimated due date from an ultrasound measurement during the second trimester is less accurate.

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And why I probably shouldn't be taking my second "due date" very seriously. Once you go past about five or six days, then you have to start considering that your dates really may be off.

Even once your doctor has established a due date, there's no guarantee that your baby will come that day. I tell patients that really, your due date is a date in the middle of almost a month-long period of time that you could have your baby.

Michael Cackovic. There are many s that labor is coming: The cervix softens, a woman may feel that her baby has "dropped" lower in the pelvis or she may experience what's known as "bloody show," discharge that contains mucus and blood.

While these are all s labor will happen — eventually — there's just no way to know when, exactly. The reality is that it's some complex mechanism between the baby's brain, the mom's brain and the placenta and we haven't figured it out yet.

Around week 36 or 37 of a woman's pregnancy, some doctors will begin to offer cervical checks at appointments, to see if a woman's cervix has started to dilate open up and efface thin out.

What we as providers are looking for is some change in the cervix, whether in dilation or effacement, so we will know things are progressing in the right direction. Some doctors may not recommend routine checks, and some women may choose to opt out of them, because while it can be tempting to have the information, being dilated or effaced doesn't tell exactly when the baby's going to come. While there's no shortage of tips to kick-start labor available on the internet, Auguste stressed that it's important to talk to a doctor about the s of labor before trying any natural induction methods.

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How accurate is your baby's due date? what to know about when you'll go into labor

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