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Acog ultrasound dating criteria

It is recommended that you empty your bladder before the test. You will lie on your back with your feet in stirrups, like for a pelvic exam. The transducer for this exam is shaped like a wand. It is covered with a latex sheath, like a condom, and lubricated before it is inserted into the vagina.

Methods for Estimating the Due Date

Currently, there is no evidence that ultrasound is harmful to a developing fetus. No links have been found between ultrasound and birth defects, childhood cancer, or developmental problems later in life. However, it is possible that effects could be identified in the future. For this reason, it is recommended that ultrasound exams be performed only for medical reasons by qualified health care professionals. Casual use of ultrasound during pregnancy should be avoided.

Women's Health Care Physicians

A procedure in which a needle is used to withdraw and test a small amount of amniotic fluid and cells from the sac surrounding the fetus. A minor surgical procedure to remove a small piece of tissue that is then examined under a microscope in a laboratory.

Management of Suboptimally Dated Pregnancies

A procedure in which a small sample of cells is taken from the placenta and tested. Changes in a body structure or function from what is normally expected that are present from birth. A pregnancy in which the fertilized egg begins to grow in a place other than inside the uterus, usually in one of the fallopian tubes.


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The stage of prenatal development that starts 8 weeks after fertilization and lasts until the end of pregnancy. A growth, usually benign, that forms in the muscle of the uterus. Disorders caused by a change in genes or chromosomes.

First Trimester Anatomic Scan

The age of a pregnancy, usually calculated from the number of weeks that have elapsed from the first day of the last normal menstrual period and often using findings from an ultrasound examination performed in the first or second trimester of pregnancy. A small device that is inserted and left inside the uterus to prevent pregnancy.

An imaging technique in which X-rays of the breast are used to detect breast cancer.

The image that is created is called a mammogram. Tissue that provides nourishment to and takes waste away from the fetus. A device that emits sound waves and translates the echoes into electrical signals. Any of the three 3-month periods into which pregnancy is divided. Sound waves that can be used to examine internal structures or as a treatment for certain conditions.

A test in which sound wave are used to examine internal structures. During pregnancy, it can be used to examine the fetus.

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Acog ultrasound dating criteria

A muscular organ located in the female pelvis that contains and nourishes the developing fetus during pregnancy. The information does not dictate an exclusive course of treatment or procedure to be followed and should not be construed as excluding other acceptable methods of practice. Variations, taking into account the needs of the individual patient, resources, and limitations unique to the institution or type of practice, may be appropriate. Women's Health Care Physicians.


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    Methods for Estimating the Due Date - ACOG

    The American College of Obstetricians and Gynecologists The College , a c 3 organization, is the nation's leading group of physicians providing health care for women. Women's Health Care Physicians. Use of this Web site constitutes acceptance of our Terms of Use.