Influences on achieving motor milestones: a twin-singleton study

Silvia Brouwer, TC van Beijsterveldt, M Bartels, JJ Hudziak, DI Boomsma

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

In order to determine if twinning impacted achievement of motor milestones the attainment of early motor milestones in twins was examined and compared to published data from singletons of the same age from the same culture and birth years. We examined the influence of twinning, sex, zygosity and birth cohort (1987-2001) on the motor development of twins aged 0 to 24 months. Data on the attainment of motor milestones (turn, sit, crawl, stand and walk) of twins were collected from maternal reports. All data were corrected for gestational age. Data from the twin sample were compared to normative data from singletons, which were available from Child Health Clinics (CHC). Analyses across twin data and the CHC singleton data revealed no differences between twins and singletons in achievement of motor milestones. Girls were able to sit without support slightly earlier than boys, otherwise there were no other sex differences. Birth-order analyses revealed minimal but significant differences in turning over from back to belly and for sitting without support between the first- and second-born. Dizygotic (DZ) twins were faster than monozygotic (MZ) twins in achieving the moment of sit, crawl, stand and walk. Twins born in earlier cohorts were faster in reaching the moment of crawl, sit and walk. It is concluded that there are no differences in time of reaching motor milestones between twins and singletons within the normal range. Sex has minimal to no effect on motor development in early childhood. DZ twins achieve motor milestones sooner than MZ twins. Attainment of gross motor milestones (crawl, stand and walk) is delayed in later birth cohorts.
Original languageEnglish
Pages (from-to)424-430
JournalTwin research and human genetics
Volume9
Issue number3
DOIs
Publication statusPublished - Jun 2006
Externally publishedYes

Keywords

  • twins
  • motor performance

Cite this

Brouwer, Silvia ; van Beijsterveldt, TC ; Bartels, M ; Hudziak, JJ ; Boomsma, DI. / Influences on achieving motor milestones: a twin-singleton study. In: Twin research and human genetics. 2006 ; Vol. 9, No. 3. pp. 424-430.
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Brouwer, S, van Beijsterveldt, TC, Bartels, M, Hudziak, JJ & Boomsma, DI 2006, 'Influences on achieving motor milestones: a twin-singleton study' Twin research and human genetics, vol. 9, no. 3, pp. 424-430. https://doi.org/10.1375/twin.9.3.424

Influences on achieving motor milestones: a twin-singleton study. / Brouwer, Silvia; van Beijsterveldt, TC; Bartels, M; Hudziak, JJ; Boomsma, DI.

In: Twin research and human genetics, Vol. 9, No. 3, 06.2006, p. 424-430.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Influences on achieving motor milestones: a twin-singleton study

AU - Brouwer, Silvia

AU - van Beijsterveldt, TC

AU - Bartels, M

AU - Hudziak, JJ

AU - Boomsma, DI

PY - 2006/6

Y1 - 2006/6

N2 - In order to determine if twinning impacted achievement of motor milestones the attainment of early motor milestones in twins was examined and compared to published data from singletons of the same age from the same culture and birth years. We examined the influence of twinning, sex, zygosity and birth cohort (1987-2001) on the motor development of twins aged 0 to 24 months. Data on the attainment of motor milestones (turn, sit, crawl, stand and walk) of twins were collected from maternal reports. All data were corrected for gestational age. Data from the twin sample were compared to normative data from singletons, which were available from Child Health Clinics (CHC). Analyses across twin data and the CHC singleton data revealed no differences between twins and singletons in achievement of motor milestones. Girls were able to sit without support slightly earlier than boys, otherwise there were no other sex differences. Birth-order analyses revealed minimal but significant differences in turning over from back to belly and for sitting without support between the first- and second-born. Dizygotic (DZ) twins were faster than monozygotic (MZ) twins in achieving the moment of sit, crawl, stand and walk. Twins born in earlier cohorts were faster in reaching the moment of crawl, sit and walk. It is concluded that there are no differences in time of reaching motor milestones between twins and singletons within the normal range. Sex has minimal to no effect on motor development in early childhood. DZ twins achieve motor milestones sooner than MZ twins. Attainment of gross motor milestones (crawl, stand and walk) is delayed in later birth cohorts.

AB - In order to determine if twinning impacted achievement of motor milestones the attainment of early motor milestones in twins was examined and compared to published data from singletons of the same age from the same culture and birth years. We examined the influence of twinning, sex, zygosity and birth cohort (1987-2001) on the motor development of twins aged 0 to 24 months. Data on the attainment of motor milestones (turn, sit, crawl, stand and walk) of twins were collected from maternal reports. All data were corrected for gestational age. Data from the twin sample were compared to normative data from singletons, which were available from Child Health Clinics (CHC). Analyses across twin data and the CHC singleton data revealed no differences between twins and singletons in achievement of motor milestones. Girls were able to sit without support slightly earlier than boys, otherwise there were no other sex differences. Birth-order analyses revealed minimal but significant differences in turning over from back to belly and for sitting without support between the first- and second-born. Dizygotic (DZ) twins were faster than monozygotic (MZ) twins in achieving the moment of sit, crawl, stand and walk. Twins born in earlier cohorts were faster in reaching the moment of crawl, sit and walk. It is concluded that there are no differences in time of reaching motor milestones between twins and singletons within the normal range. Sex has minimal to no effect on motor development in early childhood. DZ twins achieve motor milestones sooner than MZ twins. Attainment of gross motor milestones (crawl, stand and walk) is delayed in later birth cohorts.

KW - twins

KW - motor performance

KW - tweelingen

KW - motorische ontwikkeling

UR - https://www.ncbi.nlm.nih.gov/pubmed/16790152

U2 - 10.1375/twin.9.3.424

DO - 10.1375/twin.9.3.424

M3 - Article

VL - 9

SP - 424

EP - 430

JO - Twin research and human genetics

JF - Twin research and human genetics

SN - 1832-4274

IS - 3

ER -