Objective To compare the pregnant outcomes of three types of bariatric and metabolic surgery (BMS) and explore the management measures during the perinatal period after BMS. Methods A retrospective analysis was conducted for the fertility in the patients underwent BMS in our hospital from January 2014 to December 2019. The weight loss and nutritional status of women with pregnancy, results of both pregnancy and perinatal maternal and infant were analysed after sleeve gastrectomy (SG), Roux-en-Y gastric bypass (RYGB), or SG plus jejunojejunal bypass (SG+JJB) including maternal body mass index (BMI), newborn weight, neonatal complications and nutritional status of both pre-pregnancy and pregnant women before delivery. Results A total of 46 patients who underwent BMS including 16 cases in RYGB, 16 cases in SG, and 14 cases in SG+JJB delivered 48 newborns. Both twins and two babies delivered in one patient each. Mean BMI and mean weight preoperative were 40.92±6.93 and (111.29±18.10) kg in 46 patients, respectively. Thirty-six patients (78.26%) had polycystic ovary syndrome preoperatively. Mean weight was (74.19±12.62) kg before pregnancy and (83.61±11.89) kg before childbirth, and (76.56±11.39) kg after child birth one month later. Mean weight of newborns was (3.12±0.54) kg. There were 6 pregnancy case with anemia and 3 newborn with low birth weight in RYGB group. One newborn with anemia and one newborn with low birth weight were detected in SG+JJB group. Conclusions Pregnancy would be safe after the three types of BMS. Attentions should be paid on the nutritional status with perinatal guidance after surgery of malabsorption, especially RYGB.