![]() ![]() ![]() Some women have higher fundal height and in this case, it may happen to give birth after the “traditional” 42 weeks. Yet again, the figure is only indicative. Your practitioner uses this measurement to determine your gestational age, and you can also use this figure to confirm the due date. The fundal height refers to the top of your uterus that should reach your navel at about week 20. When you actually feel the first movement depends on how many pregnancies you had other factors can also influence it. The same goes for the first feel of fetal movement, which happens between the 16 th and the 22 nd week. Pregnancy milestones also offer indications on whether your pregnancy due date is correct or not, which is less accurate than an early ultrasound, One of them is the fetal heartbeat which is heard for the first time at about 9 to 12 weeks.Īs it’s easy to understand, this milestone indicates the due date with a three-week inaccuracy but fetal measurements can help the doctor understand how many weeks pregnant you are. So, if you want to check the accuracy of your calculations, ask your physician to perform an early ultrasound. However, your physician can’t deny you an early ultrasound if you ask for one. In fact, your doctor may only perform a routine early ultrasound if you’re over 35, have had miscarriages in the past, or you’re facing pregnancy complications due to your medical history. The earlier you get the first ultrasound the better because your practitioner will be able to establish the date you conceived with more accuracy.Īlthough this procedure is performed routinely in many cases, some practitioners can only recommend an early ultrasound if the pregnancy is considered at risk. Ultrasonography is a non-invasive procedure that helps doctors see what’s going on inside your womb this procedure is also one of the most accurate in establishing the due date. Using these methods at home is impossible however, prenatal care is crucial for ensuring the healthy development of the baby in the womb, therefore you can just ask your practitioner to use them to help you confirm the due date. Above all, premature babies need extra care.Īlso Read: What Vaginal discharge in pregnancy is normal?Īlternative Methods To Calculate Your Pregnancy Due Dateīesides these mathematical ways, physicians also use alternative methods to determine the pregnancy due date. If the birth of the baby is before 37 weeks of her pregnancy then the baby could be premature. You can expect the baby to come out any time during this time. The normal length of a pregnancy can vary from 37 to 42 weeks. The first day of her LMP is counted as the first day of the pregnancy. To calculate how many weeks pregnant the prospective mother is, the doctor asks her about the last period date. Pregnancy is usually calculated as per the date of the Last Menstrual Period (LMP). Starting from the first day of the prospective mother’s last menstrual period, there are about 40 weeks in a pregnancy. Mittendorf-Williams Due Date Calculation.Can’t I just calculate from the date I conceived?.What if you don’t know the date of your last period or have irregular periods?.Alternative Methods To Calculate Your Pregnancy Due Date.This is your estimated date of delivery (in blue text). You may also estimate your delivery date by using the steps 1 and 2 and the chart:įirst, locate the first day of your last menstrual period (in black text). Therefore, dates may have to be adjusted for longer or shorter menstrual cycles. This 3-step method is referred to as Naegele's Rule and is based on a normal 28-day menstrual cycle. Adding 1 year and 7 days would bring you to June 16, 2011, as your estimated due date. Counting back 3 calendar months would be June 9, 2010. Lastly, add 1 year and 7 days to that date.įor example: Your last menstrual period began on September 9, 2010. Next, count back 3 calendar months from that date. An estimated due date can be calculated by following steps 1 through 3:įirst, determine the first day of your last menstrual period. ![]() ![]() A typical pregnancy lasts, on average, 280 days, or 40 weeks-starting with the first day of the last normal menstrual period as day 1. ![]()
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