Dating sonogram pregnancy
We measure the size of the fetus and from this we calculate the expected date of delivery.
Approximately 2% of natural conceptions and 10% of assisted conceptions result in multiple pregnancy.
Ultrasound scanning can determine if babies are developing normally and if the babies share the same placenta.
If you are having a multiple pregnancy, your care provider may want to alter your nutrition and care plan as well as monitor your pregnancy more closely.
An ultraound, also known as a sonogram, is a painless and relatively inexpensive imaging test that utilizes sound waves instead of ionizing radiation. Ultrasound can give us two-dimensional, and in some applications three-dimensional, images of structures and organs in virtually any part of the body.Most women ovulate approximately 14 days before the first day of their next menses. Read more For menstrual dating assuming a 28 day cycle, ovulation would have occurred approximately feb 26. Read more I think I would be more concerned that a 41yo is almost 3 weeks post dates.Conception would have surrounded this date within 1-3 days. I assume that the small subchorionic bleed you mention was seen at 6 wks?It may be done in your regular doctor's office or you may be referred to prenatal ultrasound for a more detailed scan.Dating the pregnancy accurately is particularly relevant for women who cannot recall the date of their last period, have an irregular menstrual cycle, or who have conceived whilst breastfeeding or soon after stopping the pill.
First trimester ultrasound usually accurate to 3-5 days. So at 14 weeks I would doubt the dates would be 2w3d off. This assumes a regular 28 day cycle and ovulation on day 14 of the cycle.