Protocol - Total Pregnancy Weight Gain - Weight Measured During Gestation
There are several research contexts in which this information could be collected, and how the information is collected will vary depending on the context and availability of related information.
Weight gain during pregnancy is commonly monitored as a part of prenatal care. Total weight gain is calculated at the end of pregnancy using a self-reported pre-pregnancy weight and weight measured at the last prenatal visit before delivery (usually within 1 week of delivery). The information to be collected would be (1) weight measured at final prenatal visit (to the nearest 100 g, e.g., 59.1 kg); (2) date of final visit; (3) pre-pregnancy weight; (4) height; (5) gestational age at final visit; and (6) gestational age at delivery. If the opportunity exists to collect the gestational weight prospectively as part of the research protocol, this is preferred because weights taken using a research protocol are better standardized for amount of participant clothing and scales are regularly calibrated. See Measured Weight protocol regarding the measurement of weight, and record weight to the nearest 100 g. Data to be collected are (1) weight during pregnancy; (2) date on which the weight is taken; (3) gestational age when measurement taken; (4) pre-pregnancy weight; (5) height; and (6) gestational age at delivery.
Weights Measured during Gestation (Research Protocol)
Gestational ages, date of initial examination, and pre-pregnancy weight and height are abstracted from medical records, as described in the protocol for abstraction from prenatal charts.
Final weight in pregnancy is measured at prenatal or research visits using a research protocol (see Measured Weight).
Personnel and Training Required
For the aspects of the measures requiring chart review, the abstracter should be trained in medical terminology and records review; for measuring weights, the examiner should be trained as for 021501 Measured Weight. If measure is conducted by computer-assisted personal interviewing (CAPI), interviewer trained in CAPI administration is required; otherwise, no training is required for the paper-and-pencil interviewing (PAPI).
Computer (for computer-assisted personal interviewing [CAPI]), paper-and-pencil (for paper-and-pencil interviewing [PAPI]).
|Specialized requirements for biospecimen collection||No|
|Average time of greater than 15 minutes in an unaffected individual||No|
Mode of Administration
Medical record abstraction
Women who have had a pregnancy (20 weeks or longer) or are currently pregnant.
Weight gain in pregnancy is associated with pregnancy outcomes, and there are recommended ranges of total weight gain depending on pre-pregnancy body mass index (BMI). Women whose total gain is outside these recommendations (too low or too high) are at increased risk of delivering a low and high birth weight (i.e., small-for-gestational age [SGA] and large-for-gestational age [LGA] newborns), respectively. Risk for preeclampsia, gestational diabetes, and cesarean delivery are influenced by weight gain. Excess maternal weight gain during pregnancy, especially among those women who were normal weight before pregnancy, has also been independently associated with risk of overweight and obesity in the offspring.
|caDSR Form||PhenX PX021303 - Total Pregnancy Weight Gain Weight Measured During Ges||5806043||caDSR Form|
Total Weight Gain in Pregnancy
Process and Review
The Expert Review Panel #1 reviewed the measures in the Anthropometrics, Diabetes, Physical Activity and Physical Fitness, and Nutrition and Dietary Supplements domains.
Guidance from the ERP includes:
a. Changed name of measure
b. Added a new protocol
c. New Data Dictionary
Protocol Name from Source
American Congress of Obstetricians and Gynecologists (ACOG), Antenatal Record Forms B and C, 2014
Protocol for chart abstraction:
American Congress of Obstetricians and Gynecologists (ACOG). (2014). Antenatal Record Forms B and C. Washington, DC: Author.
Institute of Medicine, Committee to Reexamine IOM Pregnancy Weight Guidelines. (2009). Weight gain during pregnancy: Reexamining the guidelines. K. M. Rasmussen & A. L. Yaktine (Eds.). Washington, DC: National Academy Press.
Rasmussen, K. M., Catalano, P. M., & Yaktine, A. L. (2009). New guidelines for weight gain during pregnancy: What obstetrician/gynecologists should know. Current Opinion in Obstetrics and Gynecology, 21, 521-526.
|Variable Name||Variable ID||Variable Description||dbGaP Mapping|
|PX021303020100||What is today's date of examination?||N/A|
|PX021303110100||What is today's date of examination?||N/A|
|PX021303030100||What is today's date of examination?||N/A|
|PX021303040100||What is today's date of examination?||N/A|
|PX021303050100||What is today's date of examination?||N/A|
|PX021303060100||What is today's date of examination?||N/A|
|PX021303070100||What is today's date of examination?||N/A|
|PX021303080100||What is today's date of examination?||N/A|
|PX021303090100||What is today's date of examination?||N/A|
|PX021303100100||What is today's date of examination?||N/A|
|PX021303020200||What is the patient's current gestational age?||N/A|
|PX021303110200||What is the patient's current gestational age?||N/A|
|PX021303030200||What is the patient's current gestational age?||N/A|
|PX021303040200||What is the patient's current gestational age?||N/A|
|PX021303050200||What is the patient's current gestational age?||N/A|
|PX021303060200||What is the patient's current gestational age?||N/A|
|PX021303070200||What is the patient's current gestational age?||N/A|
|PX021303080200||What is the patient's current gestational age?||N/A|
|PX021303090200||What is the patient's current gestational age?||N/A|
|PX021303100200||What is the patient's current gestational age?||N/A|
|PX021303020400||What is the patient's current height?||N/A|
|PX021303110400||What is the patient's current height?||N/A|
|PX021303030400||What is the patient's current height?||N/A|
|PX021303040400||What is the patient's current height?||N/A|
|PX021303050400||What is the patient's current height?||N/A|
|PX021303060400||What is the patient's current height?||N/A|
|PX021303070400||What is the patient's current height?||N/A|
|PX021303080400||What is the patient's current height?||N/A|
|PX021303090400||What is the patient's current height?||N/A|
|PX021303100400||What is the patient's current height?||N/A|
|PX021303010100||What is the date of initial examination?||N/A|
|PX021303010200||What ist he patient's gestational age at more||N/A|
|PX021303010400||What is the patient's height?||N/A|
|PX021303010300||What is the patient's pre-pregnancy weight more||Variable Mapping|
|PX021303020300||What is the patient's current weight to the more||N/A|
|PX021303110300||What is the patient's current weight to the more||N/A|
|PX021303030300||What is the patient's current weight to the more||N/A|
|PX021303040300||What is the patient's current weight to the more||N/A|
|PX021303050300||What is the patient's current weight to the more||N/A|
|PX021303060300||What is the patient's current weight to the more||N/A|
|PX021303070300||What is the patient's current weight to the more||N/A|
|PX021303080300||What is the patient's current weight to the more||N/A|
|PX021303090300||What is the patient's current weight to the more||N/A|
|PX021303100300||What is the patient's current weight to the more||N/A|
Total Pregnancy Weight Gain
October 1, 2015
Total change in weight of the participant over the course of pregnancy for the most recent pregnancy.
The total pregnancy weight measure is used to assess the individual’s gestational weight gain in the current or past pregnancy and/or evaluate total weight gain with respect to recommendations for total weight gain based on pre-pregnancy body mass index (BMI, kg/m2).
total pregnancy weight gain - weight measured during gestation, Anthropometrics, weight, body mass index (BMI), gestational diabetes, birth weight, PRAMS
|Protocol ID||Protocol Name|
|21301||Total Pregnancy Weight Gain - Self-Reported Weight Gain|
|21302||Total Pregnancy Weight Gain - Abstracted From Prenatal Charts|
|21303||Total Pregnancy Weight Gain - Weight Measured During Gestation|
Chia, A. R., et al. (2020) Maternal plasma metabolic markers of neonatal adiposity and associated maternal characteristics: The GUSTO study. Scientific Reports. 2020 June; 10(1). doi: 10.1038/s41598-020-66026-5