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The usefulness of weight gain in predicting pregnancy complications
1Department of Obstetrics and Gynaecology, Tygerberg Hospital, South Africa.
Insights
Newly developed centile charts for pregnancy weight gain show a significant link to complications like pre-eclampsia. Their screening effectiveness is limited, questioning the necessity of routine maternal weight recording during antenatal visits.
Area of Science:
- Obstetrics and Gynecology
- Maternal-Fetal Medicine
- Public Health
Background:
- Accurate monitoring of maternal weight gain during pregnancy is crucial for identifying potential complications.
- Centile charts are tools used to assess deviations from expected weight gain patterns.
- Previous studies have explored the relationship between maternal weight and adverse pregnancy outcomes.
Purpose of the Study:
- To evaluate the clinical utility of newly developed centile charts for monitoring pregnancy weight gain.
- To investigate the association between patterns of maternal weight gain and the incidence of pregnancy complications.
- To assess the diagnostic accuracy of these charts in screening for pregnancy complications.
Main Methods:
- Retrospective analysis of data from a selected pregnant population.
- Utilized newly constructed centile charts to categorize maternal weight gain.
- Calculated sensitivity, specificity, and predictive values for screening complications.
Main Results:
- A significant association was found between maternal weight gain patterns and the incidence of pre-eclampsia and small for gestational age (SGA) babies.
- The centile charts demonstrated a sensitivity and specificity of approximately 50% for screening pregnancy complications.
- Positive and negative predictive values ranged between 49% and 53%.
Conclusions:
- While weight gain is linked to complications, the current centile charts have limited screening accuracy.
- The diagnostic performance suggests that routine maternal weight recording at every antenatal visit may not be necessary.
- Further research is needed to refine screening tools for pregnancy complications based on weight gain.
Abstract:
The usefulness of recently constructed centile charts for weight gain during pregnancy was studied. The association of weight gain in pregnancy with pregnancy complications was investigated. The incidence of pre-eclampsia and small for gestational age babies both had a significant relationship with weight gain. Use of the charts to screen for pregnancy complications on a selected population had both a sensitivity and specificity of about 50 per cent. The positive and negative predictive values of the charts ranged from 49 to 53 per cent. The question arises as to whether the routine recording of maternal weight at each antenatal visit is necessary.