5% of babies are born on the estimated due date. The actual day you go into labor will be up to your little one. The due date more of an educated guess when labor with start naturally. Try not to become emotionally attached to this specific date.
Although it’s not set in stone, about 90% of pregnant women experience spontaneous labor within 14 days of their due date. One or several of the following methods can help you calculate when to expect your beautiful baby.
Your due date is best determined during the first ultrasound. This technology uses sound waves (inaudible to humans) to create an image of your baby. The ultrasound will determine the baby’s growth and physical activity. The size of the fetus will reveal how far along you are in the pregnancy.
During the ultrasound, the crown-rump length (CRL) will be measured. This is the length of the baby from end to end. This measurement is the best way to determine the age of the fetus. The earlier the ultrasound, the more accurate the prediction will be.
9 Date of Ovulation
Your date of ovulation is the most precise data needed to estimate your due date. Unfortunately, most women do not have this information. If you have undergone In Vitro Fertilization (IVF), you will have the exact dates. Otherwise, there are several other ways to tell how long you’ve been pregnant.
This calculation is pretty simple if you have recorded the exact dates of your last menstrual period (LMP). Day one is the first day of your last period. Add 9 months and 7 days, or 280 days. This forecast assumes that you conceived on the 14th day of your 28th-day cycle.
7 Naegele’s Rule
Another way to figure out your due date is by using Naegele’s Rule. This principle counts backward instead of forwards to get the same result. Take your last LMP, add 7 days, subtract 3 months, then add 1 year. For example, if your last menstrual period started (or ended) on April 1, 2016, add seven days to equal April 8, 2016. Then, subtract three months to equal January 8, 2015, then add one year to equal January 8, 2017.
6 Pregnancy Wheel
You can also find your big day with the use of a pregnancy wheel. This is a popular method among physicians because of its simplicity. Again, your doctor will need the date of your last menstrual period. The dial of the wheel will be matched to your LMP and the marker will indicate your estimated due date.
5 Adjusted LMP
Not all women have 28-day cycles. For this reason, some ladies will need to adjust the dates of their last periods. Ovulation to the following menstrual period is always 14 days. For instance, if you have a 35-day cycle, you most likely ovulated on day 21. As long as you can pinpoint ovulation, you can determine a rough due date.
4 Date of Conception
If you don’t know your LMP, don’t worry. In fact, it’s pretty common that women do not remember. However, if you know the date of conception, you can figure out your due date. Add 266 days to the date of conception. Also, conception happens 72 hours after ovulation. Some wheels will allow you to set the date of conception rather than the date of your last period.
3 A Typical Pregnancy
The estimated due date is about 40 weeks from the first day of your last period. But, not all pregnancy lengths are the same. Every soon-to-be mother and her unborn baby are biologically set for a particular length of pregnancy. However, most women go into labor between their 37th and 42nd week of pregnancy.
2 Measure Your Uterus
There’s another method to estimate how far along you are in your pregnancy. It involves measuring your uterus in centimeters. Take a measurement from the top of your uterus to the bottom of your pubic bone. This is approximately the number of weeks since your LMP. Although this is another method to find a rough estimate of your due date, it is not an accurate way to find the age of the fetus.
1 Fetal Heartbeat
Your physician can tell how long you’ve been pregnant by listening to your baby’s heartbeat. An ultrasound fetal monitor can listen to the fetal heart around 10-12 weeks.
Try not to worry if your due date is off. The most important thing is that you and your baby are healthy. The wait may seem endless, but in no time, you will be holding your beautiful baby.