Calculation of due date One of the most important things a pregnant woman thinks about. Gestational period, gestational period, or approximately 40 weeks of gestation.
Or the period ending within a period of time from conception to delivery.
The normal 2014 is between 37 and 47 weeks. In this article, we will talk about the date of delivery, pregnancy, complete with us, to know more.
Birth rates in the natural time
Studies have shown that less than 4% of births occur on schedule, 60% occur within a week of the date of birth.
and nearly 90% occur within two weeks of the due date. The exact date of birth.
Pregnancy can be detected using pregnancy tests or by the woman herself noticing a number of symptoms including missing a period, increased core body temperature, fatigue, nausea.
and increased frequency of urination.
Tests of pregnancy involve detecting hormones that act as biomarkers of pregnancy and include clinical blood or urine tests that can detect pregnancy six to eight days after fertilization, while clinical blood tests are more accurate and can detect minute amounts of (hCG) (found only during pregnancy ) can be done earlier and in smaller amounts, but it takes longer to evaluate and is more expensive than pregnancy urine tests, and a clinical urine test can also be done but this is not necessarily and may be more expensive.
Due date calculator
There are different methods for calculating the due date.
however there are still more factors that influence the normal variance in pregnancy that are not well understood yet. Here are those ways:
1.Through ovulation or the last menstrual period
Your due date is 40 weeks after the first day of your last period or 38 weeks after ovulation.
and even if an early ultrasound is used to determine your due date it is still based on the basic idea of a 280-day gestation period.
Assuming you know the date of your last period, your primary care provider will use this to figure out your due date.
Many midwives and obstetricians use the pregnancy wheel.
a simple tool that quickly gives the 280th day of your last period.
There is a formula known as the (Naegele Rule). This is what is used in Due Date Calculator You can calculate the date by yourself using the (Naegele rule).
What is more accurate ovulation or menstruation to find out the due date of pregnancy.
Your due date in relation to ovulation is more accurate than when it is calculated based on your last menstrual period.
and if you know when you ovulate or know that your periods are longer than average, share this information with your doctor.
The dates may be a week apart but this week can make a big difference.
for example if you have a scheduled caesarean section you won’t want to schedule it too early.
And if your doctor is trying to determine if your pregnancy is overdue .
You may want to wait another week before Think of agitation.
2.Use of ultrasound
A first trimester ultrasound before 13 weeks of pregnancy can be used to provide an estimated date of delivery or to confirm a due date set by your last menstrual period.
A transvaginal ultrasound is usually done between 9 weeks and 13 weeks of pregnancy.
The length of the fetus from crown to rump and this is how they estimate the age of the fetus and from that they provide an estimated due date.
Another method called a bilateral diameter ultrasound (BPD) measures the diameter of a baby’s skull and may be more accurate than other methods, publishing research findings that more than 30% of pregnancies are past 41 weeks when using Naegele’s rule, and about 25% are gone after 41 A week when using the crown-to-rump measurement.
and only 17% passed after 41 weeks when using the bipolar drip.
With all that said, ultrasound due dates are still not ideal.
and if your ultrasound due date is different from the date on your last period.
both dates should be written in your medical records.
and if your ultrasound due date is less than seven days different from Your period due date will not change your period due date.
and if it has been stopped for more than seven days your due date may change.
Using IVF due date
If you’ve had IVF treatment, your due date will never change.
and the due dates for IVF are not determined by your last period.
the date of conception, or even the day of egg retrieval.
What is the role of fundal height
Your midwife or doctor may measure the fundal height of the uterus during good pregnancy checks.
The fundal height is the measurement in centimeters from the pubic bone to the top of the uterus and should grow at a predictable rate as the pregnancy continues.
After 20 weeks, the uterine fundal length in centimeters will be the same as the number of weeks you were pregnant. In other words, at the 21st week of pregnancy, the uterine fundus should be about 21 cm (10 inches) long.
but sometimes the base height does not exactly match and these slight differences are normal but if You’re measuring a size smaller or larger than expected. Your primary care provider may want another ultrasound.
Why is your due date important
One of the first pieces of information you’ll look for after you find out you’re pregnant is likely your due date and friends and family will want to know.
so they can look forward to greeting your new baby (and support).
and doctors, midwives and nurses will want to know so they can track important health milestones and take action.
Decisions about interventions and prenatal testing.
Your due date (sometimes called the estimated date of delivery) is less than a deadline and more like a time mark, your due date refers to the 40th week since your last menstrual period or the 38th week of ovulation.
and once you calculate your due date you are likely to give birth within four weeks Surround your due date in other words, you’re likely to see your baby within the two weeks before your due date.
Factors affecting the due date
With so much focus and excitement over the course of the given day you would have thought it would be an accurate number but this is not always the case.
determining which week of pregnancy you are in is critical to receiving good prenatal care and planning for your next life change.
Tracking the development of the fetus
Your health care provider will consider what week of pregnancy you are in when determining.
whether your pregnancy and fetal development are on track and your doctor will look for several indicators such as:
- When should a heartbeat appear on a transvaginal ultrasound
- Should the heart tone be detectable with a handheld Doppler
- When should the baby start moving
- What should be the height of the fundus of the uterus
Some prenatal tests must be done within a certain period of time.
eg ultrasound to determine viability should not be done before six weeks.
Determine if labor is premature
Babies who are born premature are at risk of many health problems.
and there are steps we can take to slow or stop preterm labor.
however there are also risks for the medicines used to stop preterm labor to both the mother and the baby.
You and your doctor have to decide together when the risks of allowing a birth outweigh the risks of intervention. This is determined in part by knowing what week of pregnancy you are in.
There are also risks to the baby and mother if the pregnancy lasts a long time and a prolonged pregnancy is when the birth does not occur at 42 weeks (after 14 weeks). days from the expected date of delivery) and if this occurs.
the midwife or doctor decides to induce labor.
Factors that can affect the due date
Every pregnant woman has her own pre-set schedule.
and many people will tell you that all of their pregnancies were of the same length and if you have two babies.
that were each born around 41 weeks.
your third baby will probably reach around 41 weeks.
Women who are pregnant for the first time tend to go into labor later.
and are likely to be a few days past your due date with your first baby.
Some people are at risk of preterm labor and 1 in 10 pregnancies end in preterm delivery.