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  2. Crown-rump length - Wikipedia

    en.wikipedia.org/wiki/Crown-rump_length

    An ultrasound showing an embryo measured to have a crown-rump length of 1.67 cm and estimated to have a gestational age of 8 weeks and 1 day. Crown-rump length (CRL) is the measurement of the length of human embryos and fetuses from the top of the head (crown) to the bottom of the buttocks (rump).

  3. Timeline of human prenatal development - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_human_prenatal...

    The fetus reaches a length of about 40–48 cm (16–19 in). The fetus weighs about 2.5 to 3 kg (6 lb 10 oz)to 6 lb 12 oz). Lanugo begins to disappear. Body fat increases. Fingernails reach the end of the fingertips. A baby born at 36 weeks has a high chance of survival, but may require medical interventions. Fetus at 38 weeks after fertilization.

  4. Fetus - Wikipedia

    en.wikipedia.org/wiki/Fetus

    A human fetus, attached to placenta, at three months gestational age. In humans, the fetal stage starts nine weeks after fertilization. [7] At this time the fetus is typically about 30 millimetres (1 + 1 ⁄ 4 in) in length from crown to rump, and weighs about 8 grams. [7] The head makes up nearly half of the size of the fetus. [8]

  5. A week-by-week guide to common pregnancy symptoms - AOL

    www.aol.com/news/week-week-guide-common...

    25 weeks pregnant baby size (Photo Illustration/Getty Images) Your body: If your blood pressure dropped during your first and second trimesters, you may see it start to return to pre-pregnancy levels.

  6. Prenatal development - Wikipedia

    en.wikipedia.org/wiki/Prenatal_development

    Maternal drug use occurs when drugs ingested by the pregnant woman are metabolized in the placenta and then transmitted to the fetus. Recent research displays that there is a correlation between fine motor skills and prenatal risk factors such as the use of psychoactive substances and signs of abortion during pregnancy.

  7. Human embryonic development - Wikipedia

    en.wikipedia.org/wiki/Human_embryonic_development

    In comparison to the embryo, the fetus has more recognizable external features and a more complete set of developing organs. Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 40 weeks.

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