title: Gestational diabetes mellitus manifests in all trimesters of pregnancy.
abstract: Screening for GDM is usually performed around 24-28 weeks of gestational age. We undertook a study to estimate the prevalence of glucose intolerance during different trimesters, as data in this aspect is sparse. A total of 4151 consecutive pregnant women irrespective of gestational weeks attending antenatal health posts across Chennai city underwent a 75 g OGTT recommended by WHO and diagnosed GDM if 2 hr PG value > or =140 mg/dl. Women who had normal OGTT at the first visit were screened with a repeat OGTT at the subsequent visits. Among the screened, 741 women (17.9%) had 2 hr PG> or =140 mg/dl and were identified to have gestational diabetes. Analysis based on gestational weeks revealed that out of the 741 GDM women, 121 (16.3%) were within 16 weeks, 166 (22.4%) were between 17 and 23 weeks and 454 (61.3%) were more than 24 weeks of gestation. Observation in this study was that 38.7% developed gestational diabetes even prior to 24th week of gestation. Out of the total 741 GDM women, 214 (28.9%) were diagnosed on repeat testing at subsequent visits. Glucose intolerance occurs in the early weeks of gestation. Women who had normal glucose tolerance in the first visit require repeat OGTT in the subsequent visits.
authors.affiliation: Diabetes In Pregnancy--Awareness and Prevention Project, Dr. V. Seshiah Diabetes Care and Research Institute, 31A Ormes Road, Chennai 600010, Tamilnadu, India. vseshiah@hotmail.com
authors.forename: V
authors.initials: V
authors.lastname: Seshiah
authors.forename: V
authors.initials: V
authors.lastname: Balaji
authors.forename: Madhuri S
authors.initials: MS
authors.lastname: Balaji
authors.forename: A
authors.initials: A
authors.lastname: Paneerselvam
authors.forename: T
authors.initials: T
authors.lastname: Arthi
authors.forename: M
authors.initials: M
authors.lastname: Thamizharasi
authors.forename: Manjula
authors.initials: M
authors.lastname: Datta
mesh_terms: D000328:Adult; D003920:Diabetes Mellitus / Q000175:diagnosis* / Q000196:embryology* / Q000453:epidemiology; D005260:Female; D005865:Gestational Age; D018149:Glucose Intolerance / Q000175:diagnosis* / Q000196:embryology; D006801:Humans; D008403:Mass Screening; D011247:Pregnancy; D011296:Prenatal Diagnosis; D015995:Prevalence