Exposure to electronic media was negatively associated with speech and language development at 18 and 24 months.

Aim: This study evaluated early speech and language development at 18 and 24 months, and associated factors, based on parental reports.

Method: We followed up the CHILD-SLEEP birth cohort of 1667 Finnish-speaking families, who were randomly recruited in 2011-2013 during routine visits to maternity clinics in the Pirkanmaa Hospital District of Finland. The women were approximately 32 weeks' pregnant at enrolment.

The acoustic voice quality index version 02.02 in the Finnish-speaking population.

The Acoustic Voice Quality Index (AVQI) is a multiparametric tool for objectively measuring the general acoustic characteristics of voice. The AVQI uses both sustained vowel and continuous speech in its analysis, and therefore, a validation is required for different languages. In the present study, validation was performed in the Finnish-speaking population.

[Developing speech].

Speech and language development is essential in following up children's wellbeing. Assessment of active early childhood vocabulary gives information about language development. Parents' assessment is reliable until about 2 years.