PSYA02H3 : Ch.12 Notes.doc
52
PSYA02H3 Full Course Notes
Verified Note
52 documents
Document Summary
Prenatal development prenatal period: the 9 months b/w conception and birth. This period is divided into 3 developmental stages: the zygotic, the embryonic, and fetal. 23rd chromosome determines sex female contributes x, whereas male contributes. Androgens: primary class of sex hormones in males. Most important androgen is testosterone they bring about development of male internal sex organs, penis and scrotum. Development of female sex organs ovaries, uterus, vagina and labia occur naturally does not need to be stimulated by hormone. Fetal stage: 3rd and 4th stage of prenatal development, which lasts for about 7 months, beginning with appearance of bone tissue and ending with birth. Motor development baby"s reflexes sucking, rooting, and swallowing are most important responses. Perceptual development newborns indicate taste preferences by facial expressing and by choosing to swallow of not swallow different liquids newborns prefer odour of mother"s breast than to other women can recognize and prefer mother"s voice.
