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Neonatal encephalopathy: an indicator of early sexual maturation in girls
C M Robertson1, D W Morrish, G H Wheler
1Department of Pediatrics, University of Alberta, Edmonton, Canada.
Insights
Neonatal encephalopathy in girls is linked to a higher incidence of early sexual maturation compared to the general population. This highlights the need for long-term monitoring of these children.
Area of Science:
- Pediatrics
- Endocrinology
- Neurology
Background:
- Neonatal encephalopathy (NE) is a serious condition affecting newborns.
- Early sexual maturation (puberty) is defined as the onset of secondary sexual characteristics before age 8 in girls.
- The incidence of precocious puberty in the general population is approximately 0.6%.
Purpose of the Study:
- To investigate the incidence of early sexual maturation in girls with a history of neonatal encephalopathy.
- To explore potential associations between NE, physical disabilities, and early sexual maturation.
- To determine if NE is a risk factor for precocious puberty.
Main Methods:
- Prospective assessment of 161 girls diagnosed with neonatal encephalopathy until 8 years of age.
- Recording of physical development, including signs of early sexual maturation.
- Comparison of incidence rates with the general population and analysis of subgroups with and without physical disabilities.
Main Results:
- Seven out of 161 girls (4.3%) with NE exhibited early sexual maturation, significantly higher than the general population rate.
- Among girls with NE and physical disabilities (n=40), 10% showed early sexual maturation.
- Three out of 121 girls (2.5%) without physical disabilities also experienced early sexual maturation.
Conclusions:
- Neonatal encephalopathy is associated with an increased incidence of early sexual maturation in girls.
- The findings suggest a potential link between NE and precocious puberty, even in the absence of progressive intracranial pathology.
- Long-term follow-up is crucial for girls with NE to monitor for endocrine and developmental changes.
Abstract:
Of 161 girls with neonatal encephalopathy who were prospectively assessed until 8 years of age, 7 (4.3%) demonstrated variable degrees of early sexual maturation. This finding was significantly greater than the accepted 0.6%, estimated for the general population. Four of the 7 girls with early sexual maturation had physical disabilities (i.e., 3 with cerebral palsy, 1 neurosensory deafness) which indicated that 10% of the 40 physically disabled girls had early sexual maturation. Three (2.5%) of 121 girls without physical disabilities matured early. Sexual maturation began 5 years or longer after the diagnosis of neonatal encephalopathy. An increased incidence of early sexual maturation in girls with neonatal encephalopathy indicates the importance of long-term follow-up of this population. This study provides an indication of a link between newborn illnesses causing neonatal encephalopathy and early sexual maturation in girls without progressive, structural, intracranial pathology and suggests further study of some girls previously diagnosed as having idiopathic precocious puberty.