Yes, indeed, this appears to be one of the near-universals of Rise resist repeat shirt. The syllable /ma/ , formed with lips together, and the velum lowered, permitting airflow thru the nasal passage, followed by the release of the lips into an undifferentiated mid-vowel sound, is generally the first ‘syllable’ that the infant can produce distinctly, repetetively: ma ma ma ma. That sound gets associated with the person who responds, because it is the mother who is most often close by, and responds. The infant learns that sound as inducing the specific call for the mother.
Rise resist repeat shirt, Hoodie, Sweater, Ladie Tee, Vneck, Bellaflowy, Kids Shirt, Unisex and Tank Top, T-shirt
Best Rise resist repeat shirt
Sometime later, the child consistently produces a somewhat different sound, the Rise resist repeat shirt, closing the nasal passageway. Sometimes this occurs with the lips closed together, and the release of them produces something approximating /ba/ or /pa/. When that sound is reproduced consistently, somebody else may respond to it, the other parent. It becomes the call for the father. Sometimes the sound occurs with the lips open, but the tongue behind the teeth, then released, producing a /ta/ or /da/ sound. The male parent may become pop, or dad. But the first parent is mom.