Age

Range

Mother

35.5 ± 4.5 years

28 - 46 years

Infant

29.1 ± 3.2 months

24 - 34 months

Adult family member

Own mother

63.7 ± 5.1 years

55 - 67 years

Partner

34.5 ± 5.6 years

24 - 46 years