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Pregnancy complications and birth outcome in patients with osteogenesis imperfecta - A population-based register
Emilie Karense Lykking1, Per Damkier2, Heidi Kammerlander3
1Department of Endocrinology, Odense University Hospital, 5000 Odense C, Denmark.
Objective:
Patients with Osteogenesis Imperfecta (OI) have varying degrees of bone fragility and increased fracture rates. There is a paucity of data related to complications to pregnancies in patients with OI and to their offspring. With this study we aim to evaluate the risk of complications to pregnancies, delivery, and offspring in pregnancies where the mother or father have OI.
Design:
Nationwide, register-based, cohort study.
Setting:
Danish health register-based data.
Population:
All pregnancies registered in the Danish health registers where one parent has OI and a reference population of all other pregnancies in the general population from 1997 to 2018.
Methods:
Descriptive epidemiology MAIN OUTCOME MEASURES: Pregnancy and delivery complications (e.g. prevalence of pre-eclampsia, eclampsia and perinatal haemorrhage), and complications in the offspring (e.g. prevalence of low birth weight, low Apgar Score, need of CPAP or NICU, prevalence of congenital malformations (using the EUROCAT classification), incidence of osteogenesis imperfecta, prevalence of birth related fractures and hospital contacts during the first year of life) from pregnancies with parental OI.
Results:
We identified 433 OI related pregnancies among 134 mothers with OI and 73 fathers with OI. The rates of pregnancy and delivery complications were similar between the OI cohorts and the reference population. More (31 % vs 19 %) children were delivered by caesarean section in the OI cohort than in the reference population.
Conclusion:
Pregnancies, where one parent have OI, result in live births to term with very few complications.
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