Abstract: Objective To investigate the clinical features and pregnant outcomes of the pregnant women with congenital adrenal hyperplasia (CAH) 21-hydroxylase deficiency (21-OHD).Methods The clinical features,therapies,pregnant outcomes of the pregnant women with 21-OHD were retrospectively reviewed in Peking Union Medical College Hospital,from January 2005 to April 2011.Results There were 8 pregnant women with 21-OHD including 5 siinple virilizing patients and 3 nonclassical 21-OHD women.Eight patients were accepted progestational and prenatal continual lower glucocorticoid treatment.During the gestational period,the dosage of glucocorticoid was adjusted in one pregnancy.The serum level of 17-alpha hydroxyprogesterone (17-OHP) were elevated after pregnancy [ (70 ± 38 ) versus (24 ±23) nmol/L,P < 0.05].The fertility and offspring rate of 8 patients was 8/12,the fertility and offspring rate of patients who started treatment at preadolescence was significantly increased (4/5 versus 4/7).Four patients were accepted genital reconstructive surgery ( clitorectomy,clitoroplasty,vulvoplasty) before pregnancy.The incidence of GDM was 1/8.All patients selected caesarean at from 37 +6 gestation weeks to 39+6 gestation weeks.The average newborn birth weight was (3210 ± 447 ) g,and height was (48 ±2) cm of 8 neonates,none of them was CAH.Conclusions Medical and surgical therapy provides satisfactory fertility and pregnancy outcomes for women with 21-OHD.It is safe to pregnant women with 21-OHD and their fetus in continual lower glucocorticoid treatment.The dosage of glucocorticoid should be carefully adjusted during the pregnancy individually according to serum level of 17-OHP.