Gestational diabetes & diabetes in pregnancy

Factors associated with maternal hyperglycaemia and neonatal hypoglycaemia after antenatal betamethasone administration in women with diabetes in pregnancy

Diabet MedPublished Prospective cohort study

Authors' conclusion

An intravenous infusion protocol effectively controls maternal glucose after betamethasone. A risk-factor-based approach may allow individualisation of therapy.

Study context

Population
Women with diabetes in pregnancy receiving two doses of 11.4 mg betamethasone 24 h apart (2017–2021), treated with the Pregnancy-IVI intravenous insulin protocol; mean age 31.9 ± 5.8 years; GDM 81%, T1D 12%, T2D 7%
Participants
347 diabetes in pregnancy (DIP) pregnancies
Outcome
Maternal glycaemic TIR and maternal insulin requirements after betamethasone; neonatal hypoglycaemia (glucose <2.6 mmol/L) in infants born within 48 h
Methodological detailsconsecutive pregnancies, regression modelling
  • Consecutive pregnancies
  • Regression modelling

Main finding

As reported in the abstract

On-infusion maternal glucose TIR (4.0-7.8 mmol/L)

On-infusion maternal glucose time-in-range (TIR) (4.0-7.8 mmol/L), IQR 77%-90%

83%

Mean on-IVI glucose (± SD)

6.6 ± 0.5 mmol/L

Observational data: associations, not effects.

Further findings

Neonatal hypoglycaemia (glucose <2.6 mmol/L), infants born within 48 h of betamethasone

Infants born within 48 h
144
Associated with pre-existing diabetes but not with measures of glycaemic control

Safety

Maternal hypoglycaemia (<3.8 mmol/L)

Uncommon; h/100 on-IVI woman hours
0.47

Original publication

Factors associated with maternal hyperglycaemia and neonatal hypoglycaemia after antenatal betamethasone administration in women with diabetes in pregnancy. Diabet Med. Published 28 November 2023. doi:10.1111/dme.15262

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