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prenatal development
- human fetus; prenatal development [Credit: age fotostock/SuperStock] human fetus; prenatal development [Credit: age fotostock/SuperStock]
- animal development: animal embryos [Credit: Encyclopædia Britannica, Inc.] animal development: animal embryos [Credit: Encyclopædia Britannica, Inc.]
- sperm [Credit: www.pdimages.com] sperm [Credit: www.pdimages.com]
- embryo: first stages [Credit: Encyclopædia Britannica, Inc.] embryo: first stages [Credit: Encyclopædia Britannica, Inc.]
- embryo: uterine implantation [Credit: Encyclopædia Britannica, Inc.] embryo: uterine implantation [Credit: Encyclopædia Britannica, Inc.]
- amnion: 23 days [Credit: Encyclopædia Britannica, Inc.] amnion: 23 days [Credit: Encyclopædia Britannica, Inc.]
- embryonic disk [Credit: Encyclopædia Britannica, Inc.] embryonic disk [Credit: Encyclopædia Britannica, Inc.]
- formation of the neural tube; prenatal development [Credit: Encyclopædia Britannica, Inc.] formation of the neural tube; prenatal development [Credit: Encyclopædia Britannica, Inc.]
- amnion: six weeks [Credit: Encyclopædia Britannica, Inc.] amnion: six weeks [Credit: Encyclopædia Britannica, Inc.]
- reproductive system, human: pregnancy and fetal development, four to nine months [Credit: Encyclopædia Britannica, Inc.] reproductive system, human: pregnancy and fetal development, four to nine months [Credit: Encyclopædia Britannica, Inc.]
- stem cell: human neural stem cells [Credit: Prof. John Sinden] stem cell: human neural stem cells [Credit: Prof. John Sinden]
- human fetal brain; prenatal development [Credit: Encyclopædia Britannica, Inc.] human fetal brain; prenatal development [Credit: Encyclopædia Britannica, Inc.]
- neuron [Credit: Encyclopædia Britannica, Inc.] neuron [Credit: Encyclopædia Britannica, Inc.]
- reproductive system, human: differentiation in external genitalia in human embryo and fetus [Credit: Encyclopædia Britannica, Inc.] reproductive system, human: differentiation in external genitalia in human embryo and fetus [Credit: Encyclopædia Britannica, Inc.]
- Human Reproduction: Fertilization and Fetal Development [Credit: Encyclopædia Britannica, Inc.] Human Reproduction: Fertilization and Fetal Development [Credit: Encyclopædia Britannica, Inc.]
- Pregnancy: Fetal Alcohol Syndrome Pregnancy: Fetal Alcohol Syndrome
- Pregnancy: How Drugs Affect a Baby Pregnancy: How Drugs Affect a Baby
- Pregnancy: The Effects of Smoking Cigarettes and Marijuana Pregnancy: The Effects of Smoking Cigarettes and Marijuana
prenatal development, also called antenatal development, human fetus; prenatal development [Credit: age fotostock/SuperStock] human fetus; prenatal development [Credit: age fotostock/SuperStock] in humans, the process encompassing the period from the formation of an embryo, through the development of a fetus, to birth (or parturition).
The human body, like that of most animals, develops from a single cell produced by the union of a male and a female gamete (or sex cell). This union marks the beginning of the prenatal period, which in humans encompasses three distinct stages: (1) the pre-embryonic stage, the first two weeks of development, which is a period of cell division and initial differentiation (cell maturation), (2) the embryonic period ... (101 of 12964 words)
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- Pre-embryonic and embryonic development
- Fetal development
- Development of organs
- Abnormal development
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