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Throughout this theory, he encompasses a multidisciplinary approach which has allowed him to contribute greatly to the understanding of the entirety of life cycle. The Seasons of a Man's Life was the first to be published, whereby he continued follow-up studies on women and their development throughout the life cycle. [1] Levinson died before ...
Within his theory, Daniel Levinson explains both the concept of adulthood itself as well as the stages by which development occurs. In order to do so effectively, he must differentiate between the life course and the life cycle. The life course, as he sees it, is the chronological process of living; from the beginning of life until the end.
Sexual differentiation is the process of development of the sex differences between males and females from an undifferentiated zygote. [1] [2] Sex determination is often distinct from sex differentiation; sex determination is the designation for the development stage towards either male or female, while sex differentiation is the pathway towards the development of the phenotype.
Development before birth, or prenatal development (from Latin natalis 'relating to birth') is the process in which a zygote, and later an embryo, and then a fetus develops during gestation. Prenatal development starts with fertilization and the formation of the zygote , the first stage in embryonic development which continues in fetal ...
Male development can only occur when the fetal testis secretes key hormones at a critical period in early gestation. The testes begin to secrete three hormones that influence the male internal and external genitalia: they secrete anti-Müllerian hormone (AMH), testosterone, and dihydrotestosterone (DHT). Anti-Müllerian hormone causes the ...
In a study measuring female attraction to males with varying levels of masculinity, it was established that women had a general masculinity preference for men's voices, and that the preference for masculinity was greater in the fertile phase of the menstrual cycle than in the non-fertile phase. [36]
This instillment leads to the development of the anima and animus. [4] Jung said that "the encounter with the shadow is the 'apprentice-piece' in the individual's development ... that with the anima is the 'masterpiece ' ". [5] Jung viewed the anima process as being one of the sources of creative ability.
Freud viewed libido as passing through a series of developmental stages in the individual, in which the libido fixates on different erogenous zones: first the oral stage (exemplified by an infant's pleasure in nursing), then the anal stage (exemplified by a toddler's pleasure in controlling his or her bowels), then the phallic stage, through a ...