Buckler J M, Robinson A
Arch Dis Child. 1974 Jun;49(6):472-6. doi: 10.1136/adc.49.6.472.
Monozygous twins had birthweights differing by 1·64 kg. The smaller twin, only 45% of her sister's weight, rapidly caught up, and at the age of 10 years physical growth was similar and there was negligible difference in their intelligence and educational attainment.