- Research Article
- 10.23736/s2724-606x.26.05845-8
Impact of low and late fertility on gestational diabetes mellitus and macrosomia.
- Mar 20, 2026
- Minerva obstetrics and gynecology
- Vincenzo Zanardo + 7 more +7
Data on the occurrence of gestational diabetes mellitus (GDM) and related offspring macrosomia are limited in women with low and delayed fertility, both of which are increasingly common in high-income countries. We evaluated the occurrence of GDM among women who delivered in Abano Terme, Italy, between January 2020 and August 2023. Baseline and clinical characteristics of women with GDM (GDM group) and those with a normal oral glucose tolerance test (control group) were analyzed in relation to neonatal macrosomia (>4000 g). Among 2600 women with low and late fertility included in the analysis, 231 (9.9%) were diagnosed with GDM. Women in the GDM group were older than control subjects (36.0 [31.5-39.0] vs. 33.0 [30.0-37.0] years; P<0.001), whereas parity did not differ between groups (2.00 [1.00-2.00] vs. 1.00 [1.00-2.00, P>0.5]). Pre-pregnancy BMI was significantly higher in the GDM group (63 [56-73] vs. 59 [54-66] kg, P<0.001), while height (164 [160-170] vs. 165 [160-170] cm, P<0.024] and gestational weight gain (GWG) (11 [8.5-14.0] vs. 13 [11.0-16.0] kg; P<0.001), P<0.001) were significantly lower. Neonatal birth weight (3400 [3080-3640] vs. 3360 [3100-3640] g; P>0.09) and the prevalence of macrosomia >4000 g (19 [8.2%] vs. 188 [8.1%]; P>0.9) did not differ between groups (P>0.09). In multivariate logistic regression analysis, the risk of GDM was significantly higher among women with low and late fertility or delayed fertility alone (odds ratios 2.3 and 1.9, respectively; P<0.001). Among maternal variables, only obesity at delivery (BMI ≥30 kg/m2) was independently associated with an increased risk of neonatal macrosomia (odds ratio 1.59; P=0.003). In women with low and late fertility, appropriate GWG may play a key role in mitigating the risk of neonatal macrosomia, even in the presence of GDM.
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