Because it's about 12 days of conception
EDD is ESTIMATED. If done by scan is 38 weeks from conception. An EDD is based on the LMP (last menstrual period) and not the date of conception. The ultrasound measurements are comparing the baby to the expected size of other babies at the same gestational age. The earlier the ultrasound is done in the pregnancy, the more accurate it will be. Hope this helps! Dr. B.
Typically, a prenatal scan indicates having a sonogram/ultrasound performed. This scan can determine the baby's heart rate, size and weight and is a better predictor of gestational age. After week 20, expectant parents often are able to ascertain the sex of their unborn child through ultrasound.
About 3 months, usually respiratory system of the baby develops at 12 weeks of age. ** The fetus's heart starts beating at five weeks gestation. Through an ultrasound you can see the ultrasound at about 6-7 weeks. With a fetal Doppler you can hear the heart beat at about 9 weeks.
Usually the doctors say the age is LMP. So if they say 15 weeks, it'd be about 13 weeks since conception.
I understand what you are saying when you say messuring, they messure the sac and it calculates what the size is to get the age of the sac/fetus.
No, sometimes doctors get the dates wrong or sometimes the baby is a little ahead or behind in growth. I would go by the Ultrasound.
Using ultrasound, yes. I had one done at 4 weeks with my first pregnancy. No everyone will see it though. Its very small..
Typically, a prenatal scan indicates having a sonogram/ultrasound performed. This scan can determine the baby's heart rate, size and weight and is a better predictor of gestational age. After week 20, expectant parents often are able to ascertain the sex of their unborn child through ultrasound.
ultrasound is more accurate. Measurments of the fetus are made during ultasound that give a more accurate gestational age
Most ultrasound machines don't list how far along you are on the pictures that are printed. The technician that is running the machine can have the computer calculate the age of the fetus using measurements.
Does will self wean their kids at about 12 to 14 weeks of age.
It depends on whether you are going to bottle feed them or not. If not they can be weaned at 12 to 14 weeks of age.