-
What Are They? -
Stage With Highest Miscarriage Risk -
Weeks 4-11 -
Weeks 12-40 -
First Prenatal Visit -
Comments -
**COMMENTSTAGLIST**
-
More -
**OTHERTAGLIST**
Embryo vs. fetus week by week
- 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.
- An embryo is termed a fetus beginning in the 11th week of
pregnancy , which is the 9th week of development afterfertilization of the egg. - A zygote is a single-celled organism resulting from a fertilized egg. The zygote divides to become a ball of cells that eventually implants in the wall of the uterus.
- This ball of cells, known as a blastocyst, develops into the embryo and placenta.
- Doctors date
pregnancy from the first day of thelast menstrual period .
What is an embryo?
Doctors define pregnancy according to the date of a woman’s last
- The first two weeks of pregnancy are counted as the time prior to
ovulation , in which the body is preparing to release an egg. - Week #3 begins with release of an egg, or ovulation
- In week #4 of pregnancy, the blastocyst implants in the wall of the uterus and develops into the placenta and embryo. The blastocyst is considered an embryo at the point when the amniotic sac develops (by about day 10 to 12 after fertilization
- An embryo represents the early stage of human development, roughly corresponding to the 5th-10th weeks of pregnancy.
What is a fetus?
After the embryonic period has ended at the end of the 10th week of pregnancy, the embryo is now considered a fetus. A fetus is a developing baby beginning in the 11th week of pregnancy.
Which stage has the most risk of miscarriage?
The greatest risks of
QUESTION
The first sign of pregnancy is most often: See AnswerThe developing embryo: Week #4 to Week #11
The embryonic period of development is the stage in which most organs are formed. Organs begin to form, and the embryo elongates and starts to assume a human-like shape. The
By 12 weeks of pregnancy almost all of the baby’s organs are formed, including the arms and legs. The brain and spinal cord, however, continue to develop throughout pregnancy. The baby is about 2 inches long at the end of the embryonic period.
Most
Fetal period: week #12 to week #40
The fetal period is a time of growth of the developing baby. The organs and structures formed in the embryonic period continue to grow and develop.
The
In the
Your first prenatal visit with your doctor or midwife
You should set up an appointment with your doctor or
- Discuss your medical history and any effect this may have on your pregnancy.
- Estimate your due date.
- Perform a physical examination.
- Order lab work to look for any infections and to determine your
blood type , immunity against certain infections, and your red blood cell count - Discuss any medications you are taking, and whether you will need to alter these during pregnancy and discuss the need for
vitamins orsupplements during pregnancy - Discuss expected
weight gain , activity level, andnutrition for a healthy pregnancy - Provide contact information to call in case you have any questions, or are worried that something is wrong
- Answer any questions you may have
- Set up your next appointment and discuss how often you should visit your doctor or midwife.
Top Embryo vs. Fetus Differences Week-by-Week Related Articles
16 Early Signs & Symptoms of Pregnancy: Could You Be Pregnant? What are the early signs and symptoms of pregnancy? Can you know before your missed period? Read about nausea and vomiting (morning sickness), bloating, tender breasts, and more. Explore first...Am I Pregnant Quiz What are early pregnancy symptoms? In some women, symptoms range from a missed period to feeling lightheaded. Others may experience typical "morning sickness" and food cravings. Could you be...Ectopic Pregnancy (Tubal Pregnancy) An ectopic pregnancy is a pregnancy located outside the inner lining of the uterus. The majority of ectopic pregnancies occur in the Fallopian tube. Signs and symptoms of an ectopic pregnancy may...
Exercise & Pregnancy Pregnancy exercises and workouts for moms-to-be include Kegel exercises and prenatal yoga. A prenatal workout is an important part of healthy living. Try these safe exercises for pregnancy.Fetal Development Take a peek inside the womb to see the stages of fetal development. Learn how embryos develop and grow during pregnancy. See week after week ultrasound images of your baby in the womb.Heartburn During Pregnancy Heartburn during pregnancy is quite common. During pregnancy the lower esophageal sphincter muscle becomes weakened , which likely occurs due to the effect of the high levels of the hormones estrogen...How Do You Bond With Your Baby While Pregnant? You can bond with your baby before birth. Both parents can sing and talk to your baby, and massage your baby bump. By the time it's born, all of its senses will have developed, so it can feel and...Ovulation & Fertility Boost fertility and increase your chances to conceive. Learn about ovulation calendars, diet, aging and other factors that can affect pregnancy.Pregnancy Myths and Facts Quiz Being pregnant is a delicate time for both mother and baby. Take this pregnancy myths and facts quiz to separate the myths and facts about being pregnant, and learn the truth behind healthy...Pregnancy Planning (Tips) Pregnancy planning is an important step in preparation for starting or expanding a family. Planning for a pregnancy includes taking prenatal vitamins, eating healthy for you and your baby, disease...Early Pregnancy Symptoms: Am I Pregnant? Pregnancy symptoms can vary from woman to woman, and not all women experience the same symptoms. When women do experience pregnancy symptoms they may include symptoms including missed menstrual...Bleeding During Pregnancy (First Trimester) Bleeding during pregnancy is never normal. Causes of bleeding during the first trimester of a pregnancy may be caused by implantation bleeding, ectopic or tubal pregnancy, subchorionic...Healthy Pregnancy Diet When a woman is pregnant, she needs more vitamins, minerals, and other foods in her diet to stay healthy and deliver a healthy baby. A healthy pregnancy diet menu plan should consist of lots of...Sexually Transmitted Diseases and Pregnancy (STDs) When you are pregnant, many sexually transmitted diseases (STDs) can be especially harmful to you and your baby. These STDs include herpes, HIV/AIDS, genital warts (HPV), hepatitis B, chlamydia,...What Happens When You Get Shingles When Pregnant? Becoming infected with chickenpox during pregnancy could cause birth defects in your unborn child. Likewise, shingles could also cause problems for your unborn child. If you are pregnant and haven't...Tubal Pregnancy Picture A pregnancy that is not in the usual place within the uterus but is located in the Fallopian tube. See a picture of Tubal Pregnancy and learn more about the health topic.