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    Intrauterine growth restriction

    Intrauterine growth retardation; IUGR

    Intrauterine growth restriction (IUGR) refers to the poor growth of a baby while in the mother's womb during pregnancy. Specifically, it means the developing baby weighs less than 90% of other babies at the same gestational age.

    Causes

    Many different things can lead to intrauterine growth restriction (IUGR). An unborn baby may not get enough oxygen and nutrition from the placenta during pregnancy because of:

    • High altitudes
    • Multiple pregnancy (twins, triplets, etc.)
    • Placenta problems
    • Preeclampsia or eclampsia

    Congenital or chromosomal abnormalities are often associated with below-normal weight. Infections during pregnancy that affect the developing baby, such as rubella, cytomegalovirus, toxoplasmosis, and syphiliscan also affect the weight of the developing baby.

    Risk factors in the mother that may contribute to IUGR include:

    • Alcohol abuse
    • Clotting disorders
    • Drug addiction
    • High blood pressure or heart disease
    • Kidney disease
    • Poor nutrition
    • Smoking

    If the mother is small, it may be normal for her baby to be small, but this is not due to IUGR.

    Depending on the cause of IUGR, the developing baby may be symmetrically small, or have a head that is normal size for gestational age, while the remainder of its body is small.

    Symptoms

    A pregnant woman may feel that her baby is not as big as it should be. The measurement from the mother's pubic bone to the top of the uterus will be smaller than expected for the baby's gestational age. This measurement is called the uterine fundal height.

    Exams and Tests

    Intrauterine growth restriction (IUGR) may be suspected if the size of the pregnant woman's uterus is small. The condition is usually confirmed by ultrasound.

    Further tests may be needed to screen for infection or genetic problems if IUGR is suspected.

    Treatment

    IUGR increases the risk that the baby will die inside the womb before birth. If your doctor thinks you might have IUGR, you will be closely monitored withregular pregnancy ultrasounds to measure the baby's growth, movements, blood flow, and fluid around the baby.

    Non-stress testing will also be done.

    Depending on the results of these tests, delivery of your babymay be necessary.

    Outlook (Prognosis)

    After delivery, growth and development of the newborn depends on the severity and cause of IUGR. The baby's outlook should be discussed with your obstetrician and pediatrician.

    Possible Complications

    Depending on the specific cause, IUGR increases the riskof pregnancy and newborn complications.Babies may have anabnormal fetal heart rate during labor, requiring delivery by C-section.

    When to Contact a Medical Professional

    Contact your provider right away if you are pregnant and notice that the baby is moving less than usual.

    Also call your health care provider if your infant or child does not seem to be growing or developing normally.

    Prevention

    Do not drinkalcohol, smoke,or use recreationaldrugs. Eat healthy foods. Get regular prenatal care. If you have a chronic medical condition or take prescribed medications regularly, see your doctor before you get pregnant. This can help reduce any effects of your medical condition on your pregnancy and the baby.

    References

    Baschat AA, Galan HL, Ross MG, Gabbe SG. Intrauterine growth restriction. In: Gabbe SG, Niebyl JR, Simpson JL, eds. Obstetrics: Normal and Problem Pregnancies. 6th ed. Philadelphia, PA: Elsevier Saunders; 2012:chap 31.

    Carlo WA. Prematurity andintrauterine growth restriction. In: Kliegman RM,Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Elsevier Saunders;2011:chap 91.

    Figueras F, Gardosi J. Intrauterine growth restriction: newconcepts in antenatal surveillance, diagnosis, and management. Am J Obstet Gynecol. 2011;204(4):288-300.

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      A Closer Look

        Self Care

          Tests for Intrauterine growth restriction

            Review Date: 11/8/2012

            Reviewed By: Susan Storck, MD, FACOG, Chief, Eastside Department of Obstetrics and Gynecology, Group Health Cooperative of Puget Sound, Bellevue, Washington; Clinical Teaching Faculty, Department of Obstetrics and Gynecology, University of Washington School of Medicine. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.

            The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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