Fetal development by week: Your baby in the womb - BabyCenter
2023年2月21日 · Nestled comfortably in the womb, your baby is constantly growing and changing. Use this timeline to learn what your baby's up to and how they're developing throughout pregnancy. Follow your baby's development week by week, from conception to labor, in these amazingly detailed, doctor-reviewed images.
Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinic
2024年3月19日 · One structure eventually becomes the embryo (and later, the fetus) and the other becomes the placenta. Cell division continues at a rapid pace. Eventually, the zygote turns into a blastocyst. The blastocyst arrives at your uterus and implants into your uterine lining.
Fetal development: The 1st trimester - Mayo Clinic
2022年6月3日 · Within the blastocyst, the inner group of cells will become the embryo. The outer layer will give rise to part of the placenta, which will nourish your baby throughout the pregnancy. By the end of the fifth week of pregnancy — three weeks after conception — …
What is the difference between an embryo, a fetus, and a baby?
2021年8月25日 · 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 becomes a neonate or newborn at birth.
Stages of Fetal Development - Women's Health Issues - Merck …
The next stage in development is the embryo, which develops within the amniotic sac, under the lining of the uterus on one side. This stage is characterized by the formation of most internal organs and external body structures.
Embryo vs. Fetus: What’s the Difference? - Healthline
2023年4月12日 · 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 all about the formation...
Stages of Fetal Development - Ask A Biologist
All of a human’s features, organs, and body systems form when they're in the womb. Let’s learn more about how embryos form, and how they grow throughout pregnancy. This image outlines the process of fertilization. Click the image for more detail. The first trimester, or stage of pregnancy, includes the first 12 weeks.
Embryo vs. Fetus: Differences Between Stages Week by Week - MedicineNet
The terms embryo and fetus both refer to the developing baby inside the mother’s womb (uterus). The distinction between embryo and fetus is made based on gestational age. An embryo is the early stage of human development in which organs are critical body structures are formed.
Embryo vs. Fetus: How to Tell Them Apart - Verywell Health
2024年7月8日 · What Is an Embryo? An embryo is the early stage of a baby’s development during pregnancy. The first stage is the fertilized egg (zygote). It divides to become a blastocyst and travels down the fallopian tube to the uterus, where it may implant to establish the pregnancy.
Fetal development: MedlinePlus Medical Encyclopedia
2023年8月23日 · Learn how your baby is conceived and how your baby develops inside the mother's womb. WEEK BY WEEK CHANGES. Gestation is the period of time between conception and birth when a baby grows and develops inside the mother's womb.