Intrauterine Growth
Restriction (IUGR) is a condition when the fetus is growing at a slower rate
than normal (Sharma et al., 2016), and it is often
associated with low birth weight or small for gestational age (SGA). However, IUGR
is not the same as SGA, even though the two terms are often used interchangeably
(Sharma, 2016). SGA means the baby weight less than 10th percentile,
whereas IUGR means the baby shows features of malnutrition and in-utero growth
retardation (Sharma, 2016). IUGR affects about 10% of pregnancies and can be
caused by a variety of factors such as maternal factors (ex: maternal age, socioeconomic
status, etc.,), fetal factors (ex: pregnant with twins or triplets, genetic
syndromes, etc.,), placental factors (ex: infections, placental weight, etc.,),
and genetics (Sharma, 2016). Diagnosis of IUGR can be more accurately
determined if the provider knows the first day of the last menstrual period and
by 3rd-trimester ultrasounds (Intrauterine Growth Restriction, n.d.). Once diagnosed,
IUGR pregnancies could be managed antenatally and monitor and during delivery
(Sharma, 2016; Peleg et al., 1998).
Babies born with an IUGR
or SGA or both are often at a higher risk for health problems that can carry
later into adulthood (Sharma, 2016). Some short-term complications of IUGR
include conditions related to the lungs (such as pulmonary hemorrhage and
persistent pulmonary hypertension), the heart and the kidneys (Sharma, 2016).
This is due to a redistribution of blood flow from other parts of the body to provide
nutrients and oxygen for the brain (Tchirikov et al., 1998) (Yajnik, 2004). Due to this,
IUGR babies also have lower muscle mass compared to babies who are appropriate
for gestational age (AGA), and this reduction in muscle mass and strength
carries into adulthood (Brown & Hay, 2016). Other long-term
consequences of IUGR that carry into adulthood include hypertension, immune
dysfunction, lung abnormalities, ischemic heart disease, etc., in addition to an
increased risk for neurodevelopmental problems (Wang et al., 2016) (Sharma, 2016) such
as poor reading and mathematics learning (Sharma, 2016).
Even though there are a
lot of complications regarding IUGR, according to Cleveland Clinic, most
fetuses diagnosed with IUGR are healthy and just need more monitoring during pregnancy.
In addition, environmental factors can play important roles in the development
of a child that carry consequences into adulthood. By providing your child with
a healthy and safe environment to live and learn in, a child with IUGR can thrive
and live happy like any other children.
Citations:
Brown, L. D., & Hay, W. W. (2016). Impact of
placental insufficiency on fetal skeletal muscle growth. Molecular and
Cellular Endocrinology, 435, 69–77.
https://doi.org/10.1016/j.mce.2016.03.017
Intrauterine
Growth Restriction: Causes, Symptoms & Treatment. (n.d.). Cleveland Clinic. Retrieved November 28,
2023, from
https://my.clevelandclinic.org/health/diseases/24017-intrauterine-growth-restriction
Peleg, D., Kennedy, C.
M., & Hunter, S. K. (1998). Intrauterine Growth Restriction: Identification
and Management. American Family Physician, 58(2), 453–460.
Sharma, D., Shastri, S.,
& Sharma, P. (2016). Intrauterine Growth Restriction: Antenatal and
Postnatal Aspects. Clinical Medicine Insights. Pediatrics, 10,
67–83. https://doi.org/10.4137/CMPed.S40070
Tchirikov, M.,
Rybakowski, C., Hüneke, B., & Schröder, H. J. (1998). Blood flow through
the ductus venosus in singleton and multifetal pregnancies and in fetuses with
intrauterine growth retardation. American Journal of Obstetrics and
Gynecology, 178(5), 943–949.
https://doi.org/10.1016/s0002-9378(98)70528-9
Wang, Y., Fu, W., &
Liu, J. (2016). Neurodevelopment in children with intrauterine growth
restriction: Adverse effects and interventions. The Journal of
Maternal-Fetal & Neonatal Medicine, 29(4), 660–668.
https://doi.org/10.3109/14767058.2015.1015417
Yajnik, C. S. (2004).
Obesity epidemic in India: Intrauterine origins? The Proceedings of the
Nutrition Society, 63(3), 387–396.
https://doi.org/10.1079/pns2004365