How to have pregnancy due date calculator? In general, most pregnancies often last 40 weeks. The reason is that it is dated from the first day of your last menstrual period. So, it is not from the beginning of a missed period as your expectation. For that reason, if you take a pregnancy test on the first day of the missed period, then you have already around 4 weeks pregnant. Want to calculate your estimated due date? Then, make sure that you remember when your last period started. This is how a doctor estimates your due date. And it is a quite solid target. There is also one important thing you need to remember! It is just as normal to deliver 1 or 2 weeks before or after.
How to have my pregnancy due date calculator?
It is not hard to calculate your due date theoretically. You just subtract 3 months from the first day of your last menstrual period. Then add 7 days. In that case, you can know when your due date will be in the following year. For example, just imagine that your last period started on March 11. Then, count backward 3 months, and you will have December. Then, add 7 days. At that time, your pregnancy due date would be December 18. In fact, the medical term for the “due date” is estimated date of delivery, or EDD. Thus, the date your doctor gives you is just an educated estimate day. Is your angel born on your due date? Then, he/she is actually 38 weeks old, not 40. That is because you clock in 2 weeks of pregnancy before actually conceiving.
What can alter your due date?
Of course, there are certain factors that may have a strong effect on your online pregnancy due date calculator. Although no reason is clear about why a mom-to-be could deliver early, abnormally early birth might be as a result of the health issues below.
- A previously undiagnosed strange-shaped uterus that can crowd the fetus.
- Multiple babies, like twins.
- Excessive smoking.
- A serious infection which result in high fever.
- A thyroid problem that is still untreated.
- Placenta previa – a serious condition.
- High blood pressure, kidney disease or diabetes.
To be sure, any of these factors above may influence your due date. Nonetheless, none of them is likely a foregone conclusion, except a multiple birth. A fall – one example of physical injuries – won’t necessarily induce early labor. In addition, there is also a race case when some women do menstruate for a few months of falling pregnant. That may cause great consternation in case you suddenly find out you’ve already 3 or 4 months pregnant.
Why does sometimes this dating system not work?
Pregnancy due date calculator based on conception usually works well for those who have a regularly menstrual cycle. What if your period is irregular? Then, the dating system cannot always work for you at all. Do you typically get your cycle every 6 or 7 weeks? Have not had one in 3 months? Then, you can get pregnant on testing. When did you conceive? In fact, a reliable EDD is really important. Hence, you and your practitioner should try best to come up with one. What should I do if I even may not pinpoint when I conceived or unsure of when I last ovulated? Don’t worry! Other clues can help you to find out your due date.
What are other ways to calculate your due date?
As we say early, there are also a few additional ways which may help your doctor determine your pregnancy due date calculator calendar as well as confirm your stage of pregnancy. The following are some typical hints:
- An early ultrasound that helps you determine your pregnancy due date accurately. But, not all of the women may get an early ultrasound. Some practitioners can perform this method routinely. Meanwhile, others just do one if their periods are irregular, if their EDD can’t be determined, depending on their LMP and physical exam, or if they have a history of pregnancy complications or even miscarriages.
- The size of your uterus. A doctor will note this detail when performing your initial internal pregnancy examination.
- Pregnancy milestones. When a healthcare provider can determines the first time of a fetal heartbeat or the first fetal movement, he may let you know when your EDD is.
- The doctor also measures the top of your uterus at each prenatal visit. For sure, the fundus should reach your navel at week 20. In this case, this could help to confirm your EDD.
What if my practitioner changes my due date?
There are two reasons why a doctor can change your due date. That is when your fetus is smaller or larger than the average fetus at a specific stage of pregnancy. In general, he might even order an ultrasound to find out the age of your kid when there is a history of irregular periods, when conception occurred no matter what oral contraceptive uses, or when the date of your LMP is unsure. So, what to benefit from an ultrasound? It allows your healthcare provider to measure the CRL (crown-rump length), or length of the fetus from one end to the other. Actually, this measurement may give the most accurate estimation for the age of the baby during the first trimester.
In brief, the doctor can change your pregnancy due date calculator, based on the ultrasound measurement. Of course, this is most likely to occur during the first trimester. You should apply this method, especially if the date estimated by the ultrasound seems to differ by more than 1 week from the date estimated by him, based on your LMP. The ultrasound is less accurate in the second trimester. Thus, the doctor probably will not adjust your date unless the estimates are likely to vary by more than 2 weeks.
How about the third trimester? It is the least accurate time to date a pregnancy. But, it is not uncommon for the healthcare provider to perform an ultrasound in the third trimester. It happens if he thinks about changing your due date. A repeat ultrasound can even offer valuable information about the growth of the fetus. In that case, you can feel reassured that the change in due date is reasonable.