My story, as I like to call it, of miscalculated ovulation. I scheduled my first OB appointment for what I thought was my 8th week of pregnancy. I marvel how this calculation often differs from pregnancy dating. . And it is often miscalculated, if based alone on the first date of the last. Despite the fact that sonographers are experts in their field, estimated due dates ( EDD) calculated from pregnancy scans can be incorrect, as Ollysmum
The vast majority of women deliver between 37 and 42 weeks of pregnancy. What causes post-term pregnancy? It is not known why some women carry a pregnancy longer than others. It is often due to a miscalculation of pregnancy conception dates. A woman is much more likely to have a post-term pregnancy if previous pregnancies went beyond 42 weeks. Why is post-term pregnancy a concern?
Post-term pregnancy is associated with longer labors and operative delivery forceps or vacuum-assisted birth.
Mothers are at increased risk for vaginal birth trauma due to a large baby. Cesarean delivery is twice as likely in a post-term pregnancy because of the size of the baby. Mothers are also at increased risk for infection and wound complications, and postpartum after birth hemorrhage. There are also risks for the fetus and newborn in a post-term pregnancy, including stillbirth and newborn death.
Toward the end of pregnancy, the placenta, which supplies the fetus with the nutrients and oxygen from the mother's circulation, begins to age and may not function as efficiently as before.
Human Chorionic Gonadotropin (hCG) Blood Test
Amniotic fluid volume may decrease and the fetus may stop gaining weight, or may even lose weight. Risks can increase during labor and birth for a fetus with poor oxygen supply. Birth injury may also occur if the baby is large. Babies born after 42 weeks may be at risk for meconium aspiration, when a baby breathes in fluid containing the first stool.
Hypoglycemia low blood sugar can also occur because the baby has too little glucose-producing stores. How is post-term pregnancy diagnosed? Correct pregnancy dating is important in accurately diagnosing and managing post-term pregnancy. In a post-term pregnancy, testing may be done to check fetal well-being and identify problems.
Wrong due date from ultrasound scan - why it happens | MadeForMums
Tests often include ultrasound, nonstress testing how the fetal heart rate responds to fetal activityand estimation of the amniotic fluid volume. Management of post-term pregnancy The goal of management of post-term pregnancy is to prevent complications and deliver a healthy baby.
I've not even had my 20 week scan yet. I have scans every few weeks so it will probably keep on changing. My baby will come when it's ready anyway, maybe weeks before or maybe weeks after my due date.
Quantitative hCG Blood Pregnancy Test: Procedure and Results
These can be carried out from week 5 or 6 of pregnancy, which is a notoriously tricky time to be accurate on dates. Measurements at such an early stage aren't accurate which is why they wait for 12 weeks to date you. We always recommend mums get a definitive dating scan closer to 12 weeks as this will be much more accurate. Just half a millimetre at such an early stage can change your date by a week. Your week scan will be far more accurate.
Can your pregnancy scan give the wrong due date?
The sonographer then said that I was only about 4. Then at the week scan I got an EDD of 15 march, so that early scan was completely out. Well, you'd think so, wouldn't you. At around 12 weeks you can get more accurate measurements. By talking to the health care professionals you should get a clearer picture as to what is happening.