
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 …
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.
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 …
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 …