Fetal development by week: Your baby in the womb - BabyCenter
2023年2月21日 · 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 fertilized 12 to 24 hours later if a sperm penetrates it.
Fetal Development: Week-by-Week Stages of Pregnancy - Cleveland Clinic
The fetal stage of development begins around the ninth week and lasts until birth. This is when the embryo officially turns into a fetus. The fetus gets its assigned sex around nine weeks of pregnancy, although your healthcare provider can’t detect it on ultrasound yet.
Fetal development: The 1st trimester - Mayo Clinic
2022年6月3日 · Fetal development begins before you even know you're pregnant. Here's what happens early on.
Fetal Development - Perinatology.com
During the first two weeks after the last menstrual period egg follicles mature in the ovaries under the stimulus of follicle-stimulating hormone (FSH) a hormone secreted by the pituitary gland in the brain.
Fetal development: The 2nd trimester - Mayo Clinic
2022年6月3日 · Fetal development takes on new meaning in the second trimester. Highlights might include finding out your baby's sex and feeling your baby move. As your pregnancy progresses, your baby might begin to seem more real. Two months ago, your baby was a cluster of cells. Now he or she has functioning organs, nerves and muscles.
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.
Fetal development: The 3rd trimester - Mayo Clinic
2022年6月3日 · Fetal development continues during the third trimester. Your baby will open his or her eyes, gain more weight, and prepare for delivery. The end of your pregnancy is near! By now, you're eager to meet your baby face to face. Your uterus, however, is still a busy place.
How Your Fetus Grows During Pregnancy - ACOG
Embryo: The stage of development that starts at fertilization (joining of an egg and sperm) and lasts up to 8 weeks. Fallopian Tube: One of a pair of tubes through which an egg travels from the ovary to the uterus. Fertilization: A multistep process that joins the egg and the sperm.
3 Prenatal Development Stages - Verywell Mind
2024年5月20日 · There are three stages of prenatal development: the germinal, embryonic, and fetal stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
Stages of Fetal Development - Stages of Fetal Development
At 8 weeks of pregnancy (6 weeks after fertilization), development of most major organ systems has begun in the embryo. The placenta has also developed and formed tiny finger-like projections (villi) that extend into the wall of the uterus.