Maternal Obesity and Small for Gestational Age Infants

Completed

Conditions studied: Obesity, Small for Gestational Age

In brief

The purpose of this retrospective pilot study is to address the effect that obesity, in the absence of other comorbidities, has on birth weight. We wish to determine if obesity is a risk factor for small for gestational age (SGA) or intrauterine growth restricted (IUGR) infants in our clinic population. There have been many studies linking maternal obesity with fetal macrosomia, defined as fetal birth weight greater than 4500 grams. However, we have noted that a percentage of our obese patient population has delivered either an SGA or IUGR infant. SGA refers to a constitutionally small infant weighing less than the 10th percentile for age. This refers to a genetically normal infant. IUGR refers to a fetus whose growth has been restricted by influences other than normal genetics. Our study population will consist of all women over the age 18 who delivered a term infant either by vaginal delivery or cesarean section at Tulsa Regional Medical Center between July 1st 2004 and December 31st 2005. The diagnosis of obesity will be based upon a Body Mass Index (weight in kilograms/height in meters squared) of thirty or greater. We will look at the infant birth weight as recorded in the patient's chart. We will define SGA or IUGR as birth weight less than the 10th percentile for gestational age as defined previously. The control group will consist of women meeting the same criteria except they will have a BMI less than thirty but greater than 19.8 as low maternal weight is also a risk factor for IUGR. We will compare the average birth weight and the rates of SGA/IUGR infants between the two groups and analyze using the chi-squared method of analysis.

Key facts

Study ID

NCT00371657

Run by

Oklahoma State University Center for Health Sciences

People needed

420

Starts

2006-07-01

Expected to finish

2006-11-01

Last updated by the study team

2008-02-04

Who can join

Age: 18 and older, up to 50. Sex: female. Healthy volunteers: accepted.

You may qualify if…

• Our study population will consist of all women over the age 18 who delivered a term infant either by vaginal delivery or cesarean section at Tulsa Regional Medical Center between July 1st 2004 and December 31st 2005. They must have had at least one visit at the Houston Park Ob-Gyn clinic, not including the initial prenatal lab visit, before delivery.

You may not qualify if…

• We will exclude women with multiple gestation, hypothyroidism, hyperthyroidism, heart disease, tobacco or drug use, gestational or preexisting diabetes, autoimmune disease of any form, hypertension, collagen vascular disease, any disease process resulting in decreased gastrointestinal nutrient absorption, or lung disease as these are conditions known to be risk factors for IUGR.

Where it is running

• Oklahoma State University Center for Health Sciences Houston Parke Clinic — Tulsa, Oklahoma, United States

Full record on ClinicalTrials.gov

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