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  1. Fetus - Wikipedia

    In human prenatal development, fetal development begins from the ninth week after fertilization (which is the eleventh week of gestational age) and continues until the birth of a newborn.

  2. Fetal development by week: Your baby in the womb | BabyCenter

    Apr 10, 2025 · Follow your baby's development week by week, from conception to labor, in these amazingly detailed, doctor-reviewed images. At the start of this week, you ovulate. Your egg is …

  3. Fetal Development: Week-by-Week Stages of Pregnancy

    Mar 19, 2024 · Fetal development is how a fetus grows during pregnancy. It begins at conception and ends at birth. Many changes occur to the fetus and the pregnant person in this time.

  4. Fetus | Growth, Development, Nutrition | Britannica

    Jan 29, 2026 · fetus, the unborn young of any vertebrate animal, particularly of a mammal, after it has attained the basic form and structure typical of its kind. A brief treatment of the fetus follows. For …

  5. Fetal development: The first trimester - Mayo Clinic

    Mar 18, 2025 · At the 11th week of pregnancy, or the ninth week after conception, your baby now is called a fetus. At this point in pregnancy, the face is broad, the eyes widely separated, the eyelids …

  6. Stages of Fetal Development - Women's Health Issues - Merck ...

    By 12 weeks of pregnancy: The fetus fills the entire uterine cavity. As the pregnancy continues, the uterus enlarges as the fetus grows. By about 14 weeks: The sex can be identified on ultrasound. By …

  7. Fetus Definition and Examples - Biology Online Dictionary

    Oct 3, 2023 · A fetus is a developing human organism in the womb from the 9th week of gestation until birth.