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Published on: June 28, 2024
Relationship Between Maternal Pre-pregnancy Weight and Offspring Weight Strengthens as Children Develop: A
Yuki Fujita1, Katsuyasu Kouda1, Harunobu Nakamura2
1Department of Public Health, Kindai University Faculty of Medicine.
Insights
Maternal pre-pregnancy body mass index (BMI) is linked to offspring BMI, particularly in adolescent females. This association strengthens with age, suggesting maternal lifestyle influences childhood weight development.
Area of Science:
- Pediatrics
- Public Health
- Human Growth and Development
Background:
- Maternal pre-pregnancy weight is a known factor associated with offspring weight.
- Maternal lifestyle factors may mediate the relationship between maternal weight and offspring weight.
- Investigating the association between maternal body mass index (BMI) and offspring BMI across different developmental stages is crucial.
Purpose of the Study:
- To examine the relationship between maternal pre-pregnancy body mass index (BMI) and offspring BMI.
- To assess how this association varies across different growth stages in offspring.
Main Methods:
- Utilized data from 480 Japanese eighth graders and their mothers' pre-pregnancy anthropometric records.
- Employed regression models to analyze the association between maternal BMI z-score and offspring BMI z-score.
- Offspring BMI z-scores were analyzed at birth, 3 years, and 13 years.
Main Results:
- Maternal BMI z-score showed a significant positive association with offspring BMI z-score in females at birth (β = 0.11), 3 years (β = 0.22), and 13 years (β = 0.51).
- In males, an association was observed only at 13 years (β = 0.19), not at birth or 3 years.
- The association between maternal BMI and offspring BMI was stronger in females at later ages, particularly around puberty.
Conclusions:
- The positive association between maternal pre-pregnancy weight and offspring weight is more pronounced around puberty.
- Maternal lifestyle factors during pregnancy may play a significant role in influencing offspring weight trajectories into adolescence.
Background:
Maternal pre-pregnancy weight has been reported to be positively associated with offspring weight. The association between maternal weight and offspring weight might be explained by maternal lifestyle. We investigated the strength of the relationship between maternal body mass index (BMI) at the beginning of pregnancy and offspring BMI at several growth stages.
Methods:
The source population was all eighth graders registered in all public schools in the city of Fukuroi, Japan, in 2012. Records of maternal anthropometry at the beginning of pregnancy were obtained from the Maternal and Child Health (MCH) Handbook. The height and body weight of each student were measured. A regression model was used to assess the association between maternal BMI z-score at the beginning of pregnancy and offspring BMI z-score at various ages.
Results:
Of the source population, data from the MCH Handbook were obtained for 480 students. Among males, maternal BMI z-score was not associated with offspring BMI z-score at birth and at age 3 years but was associated with offspring BMI z-score at age 13 years (standardized regression coefficient (β) = 0.19; P < 0.01). Among females, maternal BMI z-score was associated with offspring BMI z-score at birth (β = 0.11; P < 0.05), at age 3 years (β = 0.22; P < 0.01) and at age 13 years (β = 0.51; P < 0.01).
Conclusions:
Our results suggest that the positive association between maternal weight at the beginning of pregnancy and offspring weight around puberty is stronger than that between maternal weight and offspring weight at birth. Maternal lifestyle may influence offspring weight in adolescence.
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