When will the embryo bud grow out

The embryo bud is a relatively important factor for the fetus, because only when the embryo bud grows successfully, the pregnant woman can be considered to have finally succeeded in becoming pregnant. Of course, the embryo bud has certain characteristics and will continue to grow as the pregnancy progresses. Generally speaking, the embryo bud will finally form in about 50 days. Below, I will introduce you to the relevant knowledge about embryo buds in detail!

1. Characteristics of fetal heart rate and fetal bud

The first month of pregnancy is the embryonic stage, during which the new life grows the fastest in its life. The sperm and egg combine at the end of the second week of pregnancy. About 4 days after fertilization, the sperm and egg, which have split into cell clusters, travel along the fallopian tube to the uterus. In the third week, the cell mass sheds its outer membrane in preparation for implantation. By the fourth week, the blastocyst has been firmly implanted in the uterus. During this period, the prototypes of the fetal nervous system and circulatory organs (the basic tissues) have almost appeared, and the liver begins to develop significantly from this period; the prototypes of the eyes and nose have not yet been generated, but the prototypes of the mouth and chin can be seen; the umbilical cord connected to the mother also begins to develop from this period.

2. Formation time

Because the development of the embryo is normal, the gestational sac is formed in 30-40 days, the fetal bud is formed in 40-50 days, and the fetal heart is formed in 50-60 days. Therefore, B-ultrasound should be done around 60 days. At this time, you can see whether the gestational sac, fetal bud and fetal heart are normal.

The period from the third trimester to the first month and four weeks of pregnancy is called the embryonic stage. The embryo is 0.5-1 cm long and shaped like a small seahorse.

3. Abnormal embryo

Embryonic factors

1. Abnormal embryonic development is the most common cause of early miscarriage, and miscarriage caused by chromosomal abnormalities accounts for about 50~60%.

2. Placental abnormalities: Due to incomplete development of the trophoblast, degeneration of the placental villi, or the placenta being attached too low, fetal-placental circulation may be impaired, leading to miscarriage.

Maternal factors

1. Acute infectious diseases, which may cause fetal death due to pathogens or toxins invading through the placenta, or cause uterine contractions and miscarriage due to high fever or poisoning;

2. Severe anemia or heart failure, resulting in fetal hypoxia and death;

3. Endocrine disorders, such as corpus luteum insufficiency, lead to decidua dysplasia and affect the development of fertilized eggs;

4. Uterine hypoplasia, uterine fibroids or malformations can also hinder embryonic development;

5. Sometimes, the relaxation of the internal cervix can cause the inability to withstand the increased pressure of the fetal sac, leading to late miscarriage;

6. Strong mental stimulation, trauma or sexual intercourse can also cause miscarriage, but the inducing factors are often mainly caused by defects in the embryo itself.