If either you or your partner was a 'big' baby, you have an increased likelihood of giving birth to a large baby yourself, a new study by researchers from the University of Bergen, Norway, shows. This could potentially improve prenatal care and interventions by identifying pregnancies at higher risk of obstetric complications during labor and delivery.
Paediatric and Perinatal EpidemiologyIf either you or your partner was a"big" baby, you have an increased likelihood of giving birth to a large baby yourself, a new study by researchers from the University of Bergen, Norway, shows. This could potentially improve prenatal care and interventions by identifying pregnancies at higher risk of obstetric complications during labor and delivery.
The study from Norway explored the connection between parent's own birthweight and the risk of having a big baby, and to what extent maternal body-mass index in early pregnancy also contributes to this risk. Exploiting the Medical Birth Registry of Norway, the oldest in the world, the researchers combined information on parent's own birthweight to pregnancies they parented.
Parents and offspring born during a 50-year period were included, resulting in information on 647,957 births with available information on both parents' birthweight. The study included only singleton newborns carried to term. Macrosomia, the scientific word for a"big" baby, was defined as a newborn weighing 4500 grams or more, and was more common among the offspring generation, with 4.0% compared to 3.2% among the parent generation.
The risk of giving birth to a macrosomic infant was much higher if the parents themselves were big at birth. Compared to both parents weighing below 4500 grams, there was a more than 6-fold increase if both had been big. Even with only one parent being macrosomic, the risk was more than double if the father had been macrosomic and more than 3 times if the mother only had been macrosomic .
The researchers also explored whether maternal BMI at the beginning of pregnancy contributed to the risk of birthing a macrosomic baby. The proportion of macrosomic newborns varied substantially by maternal BMI. Among the group where both parents had been born macrosomic, the proportion of babies also being macrosomic ranged from 17% when born to women who were
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