chris paul dating - Dating ultrasound measurements

Sometimes a trans-vaginal examination shows that your pregnancy is less advanced than expected.The earlier the ultrasound is done, the more accurate it is at estimating the baby's due date.Having an ultrasound in the first trimester of pregnancy can be a thrilling experience. Bear in mind that you may need a second ultrasound before you know for certain if all is well.

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The LMP is used because most women know when their last period was, but may not know when they actually conceived.

If you do know the conception date, this is classed as day 14 and not day one.

The ultrasound date is usually later than the period date, so accurate dating has been found to reduce the number of women having labour induced because their babies are overdue The ultrasound can check that your baby has a heartbeat and is developing normally.

Your baby's head, limbs, hands and feet, and some organs can be seen, and - though looking for abnormalities isn't the purpose of the ultrasound - some major problems can be seen at this early stage.

If you have an irregular cycle, or if you've recently been taking the contraceptive pill, working out the date from your LMP isn't a very accurate method.

Ultrasounds are more accurate than using the LMP and, if the ultrasound date differs from your period dates, the ultrasound date will be used.

D., an ob-gyn in Beverly Hills and author of Expecting 411.

"It helps us determine if the size of the fetus matches up with the size it should be based on the patient's last menstrual period." If this number is considered off early on, that could indicate potential issues.

"A smaller crown-rump length may signal an embryo that is not developing normally and may have a chromosomal problem, or it could mean that a woman's dates are off and she is not as far along as she thinks."After the first trimester, your baby will also have measurements taken of the diameter and circumference of her head, the circumference of her abdomen, and the length of her femur bone.

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