Linked Life Data

2889914

Source:http://linkedlifedata.com/resource/pubmed/id/2889914

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8566
pubmed:dateCreated
1987-12-7
pubmed:abstractText
The energy cost of pregnancy was measured in rural Thai women between 10 wk gestation and term. The energy cost of pregnancy, which includes the increase in basal metabolic rate (BMR), the energy equivalent of maternal fat laid down, and the assumed energy equivalent of fetal fat and fetal and maternal protein, was 202 MJ (1 MJ = 239 kcal). BMR increased by 100 MJ overall and maternal fat gain averaged about 1.3 kg, equivalent to 60 MJ. The energy cost was more than covered by an overall increase in food intake of 238 MJ with little evidence of any complementary reduction in total energy expenditure by reduced physical activity.
pubmed:keyword
http://linkedlifedata.com/resource/pubmed/keyword/Asia, http://linkedlifedata.com/resource/pubmed/keyword/Biology, http://linkedlifedata.com/resource/pubmed/keyword/Body Weight--changes, http://linkedlifedata.com/resource/pubmed/keyword/Demographic Factors, http://linkedlifedata.com/resource/pubmed/keyword/Developing Countries, http://linkedlifedata.com/resource/pubmed/keyword/Health, http://linkedlifedata.com/resource/pubmed/keyword/Maternal Nutrition, http://linkedlifedata.com/resource/pubmed/keyword/Nutrition, http://linkedlifedata.com/resource/pubmed/keyword/Physiology, http://linkedlifedata.com/resource/pubmed/keyword/Population, http://linkedlifedata.com/resource/pubmed/keyword/Population Characteristics, http://linkedlifedata.com/resource/pubmed/keyword/Pregnancy, http://linkedlifedata.com/resource/pubmed/keyword/Reproduction, http://linkedlifedata.com/resource/pubmed/keyword/Rural Population, http://linkedlifedata.com/resource/pubmed/keyword/Southeastern Asia, http://linkedlifedata.com/resource/pubmed/keyword/THAILAND
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0140-6736
pubmed:author
pubmed:issnType
Print
pubmed:day
31
pubmed:volume
2
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1010-2
pubmed:dateRevised
2006-11-15
pubmed:otherAbstract
PIP: 44 healthy pregnant women from 12 villages near the city of Ubon, northeast Thailand, were studied as part of a multicenter study investigating energy requirements during pregnancy. Total energy intake was measured to determine whether it increased to cover the costs of pregnancy and total energy expenditure. It was hypothesized that some of the energy necessary for pregnancy could be met by reductions in physical activity or by other means. Besides the usual household tasks, all 44 women participated in farming, and all continued working until term. 31 women were recruited at 7-12 weeks gestation; 13 joined at a later stage of gestation (up to 18 weeks). Measurements were made every 6 weeks from the subject's joining the study until term. Body weight was recorded on a carefully calibrated balance, and skinfold thicknesses at 4 sites -- biceps, triceps, subscapular, and suprailiac -- were measured with Harpenden calipers. Basal metabolic rate (BMR) was measured under standard conditions by the Douglas bag technique. Every 6 weeks a minute-by-minute record of daily activity was kept by an observer for 5 consecutive days simultaneously with the food intake record. For a few hours before she went to bed, the woman kept a written record of her own activities if she could write, or she ticked off her activities on a form with pictorial representations. Weight gain from 10 weeks until term was 8.9 (2.9) kg with a uniform rate of about 0.3 kg/week. Maternal fat gain was calculated by 3 different approaches. By the factorial method (total weight gain minus the weight of the fetus, the placenta, and the expanded maternal tissues, the estimated fat gain (43 women) was 1.3 kg. Fat mass was estimated by measuring 4 skinfold thicknesses in 25 women at 10 weeks gestation (fat mass 11.0 kg) and 4 week postpartum (fat mass 12.1 kg), giving an estimated gain of 1.1 kg fat. For the 3rd method, the change in weight between 10 weeks gestation (46.9kg) and 4 week postpartum (49.3) was calculated. 0.4 kg was subtracted to allow for the increase in the weight of the breasts and the remaining weight was assumed to be adipose tissue containing about 80% fat, giving an estimated fat gain of 1.6 kg. The average maternal fat gain from the 3 different approaches was 1.3 kg, with an estimated energy equivalent of 59.8 MJ. There was a nonsignificant increase in BMR from 10 weeks to 15 weeks, and thereafter a substantial rise until term. BMR increased by 100 MJ overall, and maternal fat gained averaged about 1.3 kg, equivalent to 60 MJ. The energy cost was more than covered by an overall increase in food intake of 238 MJ with little evidence of any complementary reduction in total energy expenditure by reduced physical activity.
pubmed:meshHeading
pubmed:year
1987
pubmed:articleTitle
Energy requirements of pregnancy in rural Thailand.
pubmed:affiliation
Research Centre, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't