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Ovarian stimulation leads to shorter stature in childhood
Tim Savage1, John C Peek, Elizabeth M Robinson
1Liggins Institute and National Centre for Growth and Development, University of Auckland, Private Bag 92019, Auckland, New Zealand.
Insights
Children conceived via ovarian stimulation alone (OS(A)) were shorter, especially boys, and had lower BMI compared to naturally conceived children. Fasting glucose was also lower in OS(A) children.
Area of Science:
- Reproductive endocrinology
- Pediatric growth and development
- Metabolic health
Background:
- Ovarian stimulation alone (OS(A)) is a method of assisted reproduction.
- The phenotypic and biochemical outcomes of children conceived via OS(A) are not fully understood.
- Comparison with naturally conceived children of fertile and subfertile parents is needed.
Purpose of the Study:
- To investigate phenotypic and biochemical differences in children conceived with OS(A) compared to naturally conceived children.
- To assess anthropometric, endocrine, and metabolic parameters in pre-pubertal children.
Main Methods:
- Recruited healthy pre-pubertal children (3-10 years) born at term after singleton pregnancies.
- Allocated children into three groups: OS(A), naturally conceived (subfertile parents), and naturally conceived (fertile parents).
- Recorded anthropometric (height, BMI SDS corrected for genetic potential) and metabolic (fasting glucose) parameters.
Main Results:
- OS(A) children were significantly shorter than children of both subfertile and fertile parents, particularly boys.
- OS(A) children exhibited a trend towards lower corrected BMI SDS compared to controls.
- Fasting glucose levels were lower in OS(A) children compared to children of fertile parents.
Conclusions:
- Conception following OS(A) is associated with reduced stature, notably in boys.
- Lower BMI and fasting glucose levels were observed in OS(A) children.
- Further research may be warranted to understand long-term implications.
Background:
We aimed to determine whether children conceived with ovarian stimulation alone (OS(A)) would differ phenotypically and biochemically from naturally conceived children of fertile and subfertile parents.
Methods:
Healthy pre-pubertal children aged 3-10 years, born at term, after singleton pregnancies were recruited in Auckland (New Zealand) and were allocated into three groups: (i) children conceived following OS(A) and naturally conceived children of (ii) subfertile and (iii) fertile parents. Anthropometric, endocrine and metabolic parameters were recorded. Children's heights and body mass index (BMI) were expressed as standard deviation scores (SDS) and corrected for genetic potential (i.e. parental height or BMI).
Results:
Three hundred fifty-two children were studied: 84 OS(A) subjects and 268 naturally conceived controls consisting of 54 children of subfertile parents and 214 children of fertile parents. Children of subfertile and fertile parents did not differ in measured outcomes. Overall, OS(A) children were shorter than children of both subfertile (SDS: -0.08 ± 0.09 versus 0.32 ± 0.07; P= 0.001) and fertile (SDS: -0.08 ± 0.09 versus 0.45 ± 0.10; P= 0.004) parents when corrected for genetic height potential. OS(A) boys were shorter than boys of subfertile (SDS:-0.18 ± 0.14 versus 0.42 ± 0.16; P= 0.03) and fertile (SDS: -0.18 ± 0.14 versus 0.35 ± 0.08; P= 0.01) parents. There was also a trend towards OS(A) girls being shorter than girls of subfertile parents (P= 0.06), but not significantly shorter than those of fertile parents (P= 0.17). OS(A) children also had a lower corrected BMISDS than children of subfertile (SDS-0.90 ± 0.15 versus -0.37 ± 0.17; P= 0.06) and fertile (-0.90 ± 0.15 versus -0.34 ± 0.10; P= 0.008) parents. Among metabolic parameters, fasting glucose was lower in OS(A) children than that in children of fertile parents (4.62 ± 0.07 versus 4.81 ± 0.04; P= 0.006).
Conclusions:
Conception after OS(A) was associated with shorter stature, particularly in boys, compared with naturally conceived children of fertile and subfertile parents.
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