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Sexual orientation. The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation that emerges later in the individual. Prenatal hormones may be seen as the primary determinant of adult sexual orientation, or a co-factor.
Follow-Me Bee Crawl Toy. This developmental toy uses light, music, and movement to encourage your baby to crawl. The toy can be set to move in a circular pattern and won't stray far from beginner ...
By the end of the fifth month, the fetus is about 20 cm (8 in) long. Weeks 26 to 38 (6.6 to 8.6 months) ... It is rare for a baby weighing less than 500 g (1 lb 2 oz ...
t. e. Child development stages are the theoretical milestones of child development, some of which are asserted in nativist theories. This article discusses the most widely accepted developmental stages in children. There exists a wide variation in terms of what is considered "normal", caused by variations in genetic, cognitive, physical, family ...
Sexual differentiation in humans. The human Y chromosome showing the SRY gene which codes for a protein regulating sexual differentiation. Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following ...
Infant (from the Latin word infans, meaning 'baby' or 'child' [ 1]) is a formal or specialised synonym for the common term baby. The terms may also be used to refer to juveniles of other organisms. A newborn is, in colloquial use, an infant who is only hours, days, or up to one month old. In medical contexts, a newborn or neonate (from Latin ...