
Fetus - Wikipedia
A fetus is a stage in the prenatal development of viviparous organisms. This stage lies between embryogenesis and birth. [ 1 ] Many vertebrates have fetal stages, ranging from most …
FETUS Definition & Meaning - Merriam-Webster
The meaning of FETUS is an unborn or unhatched vertebrate especially after attaining the basic structural plan of its kind; specifically : a developing human from usually two months after …
Embryo vs. Fetus: What’s the Difference? - Healthline
Apr 12, 2023 · In human pregnancies, a baby-to-be isn’t considered a fetus until the 9th week after conception, or week 11 after your last menstrual period (LMP). The embryonic period is …
Fetus | Growth, Development, Nutrition | Britannica
Feb 22, 2025 · 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 …
Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinic
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.
What is the difference between an embryo, a fetus, and a …
Aug 26, 2021 · When egg and sperm meet, a zygote is formed and quickly begins dividing to become an embryo. As pregnancy progresses, the embryo becomes a fetus. The fetus …
Fetus - Definition, Stages and Development - Biology Dictionary
Jul 6, 2017 · Fetus Definition Fetal development occurs between the embryonic stage of development and birth in humans. This stage begins after 11 weeks of gestation, when the …
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 …
Fetus Definition and Examples - Biology Online Dictionary
Oct 3, 2023 · A fetus is defined as a developing mammal inside the mother’s womb before it is born. The fetal stage succeeds the embryonic developmental stage . During pregnancy , the …
Embryo vs. Fetus: How to Tell Them Apart - Verywell Health
Jul 8, 2024 · An embryo and a fetus are different stages of your baby’s development during pregnancy. The embryonic stage happens first and lasts through week 10. The fetal stage …