... nocturnal ejaculation of 13 years and 2 months, which was approximately 3 months younger on average than boys who were living with their father. Figure 5. Upper panel: Kaplan–Meier estimates of survival curves for the age at puberty for Korean boys and girls living in father-absent households (solid lines...

... only. As panel h shows, there was an increase in insomnia symptoms from 4 to 8 months, and a decrease from 8 to 12 months. No significant effects were found for fathers. Figure 3 presents the triadic Pearson correlations between maternal, paternal, and infant sleep measures throughout the different...