Psychology 101 Prenatal Development Youtube From 9–12 weeks, the sex organs begin to differentiate. at about 16 weeks, the fetus is approximately 4.5 inches long. fingers and toes are fully developed, and fingerprints are visible. by the time the fetus reaches the sixth month of development (24 weeks), it weighs up to 1.4 pounds. There are three stages of prenatal development: germinal, embryonic, and fetal. keep in mind that this is different than the three trimesters of pregnancy. let’s take a look at what happens to the developing baby in each of these stages. “the body of the unborn baby is more complex than ours. the preborn baby has several extra parts to his.
Developmental Psychology Definition Theories Life Phases From 9–12 weeks, the sex organs begin to differentiate. at about 16 weeks, the fetus is approximately 4.5 inches long. fingers and toes are fully developed, and fingerprints are visible. by the time the fetus reaches the sixth month of development (24 weeks), it weighs up to 1.4 pounds. The three prenatal development stages involve the processes that occur from conception to birth. the first stage, known as the germinal stage, involves the formation of the zygote and early cell division. the second stage, called the embryonic stage, involves the early growth of the embryo, including the formation of the neural tube, which will. The last stage of prenatal development is the fetal stage, which lasts from two months after conception until birth. about one month into this stage, the sex organs of the fetus begin to form. the fetus quickly grows as bones and muscles form, and it begins to move inside the uterus. organ systems develop further and start to function. The developmental psychology 101 series is divided into six chapters: 1. developmental psychology 101: theories of development. 2. developmental psychology 101: methods of studying development. 3. developmental psychology 101: prenatal development and birth. 4. developmental psychology 101: development in infancy.
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