Infant boys are more vocal than infant girls
Although it is generally assumed females have a language advantage over males, Oller et al., studying all-day recordings of 100 infants, found that boys in the first year of life produced more speech-like vocalizations than girls and that the effect size was more than four times larger than the commonly reported female language advantage.
Oller, D., Griebel, U., Bowman, D., Bene, E., Long, H., & Yoo, H. (2020). Infant boys are more vocal than infant girls. Current Biology, 30 (10), R426-R427. https://doi.org/10.1016/j.cub.2020.03.049