{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T17:01:43Z","timestamp":1769187703014,"version":"3.49.0"},"reference-count":29,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2020,5,2]],"date-time":"2020-05-02T00:00:00Z","timestamp":1588377600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Introduction: Obesity in pregnant women increases the incidence of pregnancy-induced comorbidities and the rate of operative deliveries. Purpose of the Study: As bariatric surgery is the reference method of treatment of obesity, we wanted to evaluate its influence on the course of pregnancy and perinatal outcomes. Material and Methods: Data was collected from 627 female patients after bariatric surgery, of whom 107 had a history of pregnancy after the surgery, and 345 non-bariatric patients who had a delivery at a tertiary perinatal center. Sixty-one cases were matched (1:1) with controls for age, pre-pregnancy BMI and presence of pre-pregnancy comorbidities. The main endpoints were gestational diabetes mellitus (GDM), pregnancy-induced hypertension (PIH), small (SGA) and large for gestational age infants (LGA) and cesarean sections (CS). Results: Patients after bariatric procedures were significantly less likely to have GDM (19.67%\/37.7%; p = 0.0433), PIH (11.47%\/16.39%; p = 0.6072) and preterm delivery (13.11%\/37.7%; p = 0.0026). The CS rate was higher (57.38%\/40.98%; p = 0.0987). There was an increased risk of SGA (18.03%\/13.11%; p = 0.6072) and a decreased risk of LGA (6.56%\/16.39%; p = 0.146). Conclusions: Patients after bariatric surgery have a decreased risk of pregnancy-induced comorbidities, preterm deliveries and LGA infants, with an increase in rate of CS and SGA infants compared to general population matched for pre-pregnancy BMI, age and presence of pre-pregnancy comorbidities.<\/jats:p>","DOI":"10.3390\/jcm9051324","type":"journal-article","created":{"date-parts":[[2020,5,5]],"date-time":"2020-05-05T06:41:20Z","timestamp":1588660880000},"page":"1324","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["The Influence of Bariatric Surgery on Pregnancy and Perinatal Outcomes\u2014A Case-Control Study"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5764-3811","authenticated-orcid":false,"given":"Anna","family":"R\u00f3\u017ca\u0144ska-Wal\u0119dziak","sequence":"first","affiliation":[{"name":"2nd Department of Obstetrics and Gynecology, Medical University of Warsaw, Karowa 2 St., 00-315 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4311-9995","authenticated-orcid":false,"given":"Maciej","family":"Wal\u0119dziak","sequence":"additional","affiliation":[{"name":"Department of General, Oncological, Metabolic and Thoracic Surgery, Military Institute of Medicine, Szaser\u00f3w 128 St., 04-141 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pawe\u0142","family":"Bartnik","sequence":"additional","affiliation":[{"name":"2nd Department of Obstetrics and Gynecology, Medical University of Warsaw, Karowa 2 St., 00-315 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2539-3894","authenticated-orcid":false,"given":"Joanna","family":"Kacperczyk-Bartnik","sequence":"additional","affiliation":[{"name":"2nd Department of Obstetrics and Gynecology, Medical University of Warsaw, Karowa 2 St., 00-315 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Micha\u0142","family":"Janik","sequence":"additional","affiliation":[{"name":"Department of General, Oncological, Metabolic and Thoracic Surgery, Military Institute of Medicine, Szaser\u00f3w 128 St., 04-141 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4984-6739","authenticated-orcid":false,"given":"Piotr","family":"Kowalewski","sequence":"additional","affiliation":[{"name":"Department of General, Oncological, Metabolic and Thoracic Surgery, Military Institute of Medicine, Szaser\u00f3w 128 St., 04-141 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrzej","family":"Kwiatkowski","sequence":"additional","affiliation":[{"name":"Department of General, Oncological, Metabolic and Thoracic Surgery, Military Institute of Medicine, Szaser\u00f3w 128 St., 04-141 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Krzysztof","family":"Czajkowski","sequence":"additional","affiliation":[{"name":"2nd Department of Obstetrics and Gynecology, Medical University of Warsaw, Karowa 2 St., 00-315 Warsaw, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,5,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"689","DOI":"10.1016\/j.gtc.2016.07.006","article-title":"The Surgical Management of Obesity","volume":"45","author":"Neylan","year":"2016","journal-title":"Gastroenterol. 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