BMP2 and congenital adrenal hyperplasia: ELISA results showed in the Col-B2 group, the concentration of BMP-2 was 12.65 ng/ml after 1 h, dropping to 7.9 ng/ml after 12 h, and 2.28 ng/ml after 7 days, while BMP-2 in the CAH group was 5.38 ng/ml after 1 h, was still around 4.59 ng/ml after 7 days, and was still maintained at 3.70 ng/ml at day 14.