Women with little paid maternity leave may want to work until the last possible moment they can. Those whose due date has come and gone may wonder whether they should have labor induced with drugs. And pregnant women who already have other children often scramble to find child care during labor.
But there haven't been reliable methods to tell a woman exactly when her baby is coming.
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Cervical checks, in which a doctor manually feels the length and softness of the cervix with his or her fingers, are typically not very reliable, Berghella said. However, studies have shown that women who have a short cervix, less than 1 inch 2.
That made researchers wonder whether similar scans could be predictive during the homestretch of pregnancy. To answer that question, Berghella looked at five studies in which researchers used ultrasounds to measure cervical length of a total of pregnant women.
He found that among the women whose cervix was more than 1. By contrast, among the women whose cervixes were less than 0. An International Journal of Obstetrics and Gynecology. In late pregnancy, as the body prepares for labor , the cervix — a cone-shaped organ that sits between the uterus and the vagina — begins to flatten out. And during labor, the cervix thins down, or effaces completely, and then opens to allow the baby's head to come out.
can a scan give you the wrong dates
That's why manual exams don't predict labor very well: Because the changes are happening internally, doctors can't feel them from the outside. However, transvaginal ultrasounds reveal the shape of the entire cervix, allowing doctors to see if the process has started, Berghella said. Estimating due dates more closely could help doctors make medical decisions. For babies with congenital anomalies who must be delivered in a hospital, getting a better estimate of the due date could ensure safer delivery. I'm not sure tho that a baby measures 2 weeks ahead tho.
Mine is often 4 days ahead of my due date the gave me at my dating scan at 6 weeks. There can be some variances in due date vs when you had intercourse but a 2 week difference is a lot.
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Maybe you ovulate early and baby is big? Its hard to tell with out a 1st tri scan to compare.
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You add two weeks before you were actually pregnant. That's why they go off your last period because most people ovulate about 14 days after CD1.
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I think the issue is how you're counting, you wouldn't count from when you had sex but at least 2 weeks before that. It's unlikely the ultrasound would be wrong by 2 weeks.
The start of your pregnancy begin the first day of your last missed period. My last missed period was nov 11th so that makes me 17weeks tomorrow. I think you're adding your dates wrong I sure I got pregnant between December 4th-6th. I was tracking ovulation haha I had a longer than normal cycle around 30 days.
And I will be 16 weeks on Saturday and my son has been measuring 3 days ahead. So it's completely possible. My conception date is for sure Dec 06 as well.
Can your pregnancy scan give the wrong due date?
Your baby can measure ahead or behind the average, which is what the scan is based upon. My doc said although the scan was a few days off of my LMP estimation, he'll stick with our first date because I'd been using an app to track my periods and was certain of the LMP date. I know the exact day I got pregnant because my husband is never home.