TFAP2B and obesity due to melanocortin 4 receptor deficiency: Notably, there were two SNPs overlapping between adult obesity and childhood BMI, namely, rs987237 (TFAP2B) and rs13130484 (GNPDA2), but no overlaps were found in birth weight, adult obesity and childhood BMI, which means that some childhood obesity may continue into adulthood, while birth weight has a limited effect on childhood or adult obesity.