Is it normal to not see the embryo at 45 days of pregnancy?

Many pregnant mothers are worried about not seeing the embryo bud after 45 days of pregnancy. Nowadays, many female friends are busy with their careers, so they get pregnant at an older age. Therefore, once they become pregnant, they will be particularly worried about what will happen to their babies. They will be particularly scared when they see no embryo bud during B-ultrasound. So, is it normal to not see the embryo bud after 45 days of pregnancy? Let us find out together.

Due to late conception and relatively few days of pregnancy, the gestational sac could not be seen under B-ultrasound examination. Under normal circumstances, the fetal heart, fetal bud and gestational sac can be seen within 60 days of pregnancy. It is recommended that you repeat the B-ultrasound after one week of observation to clarify the fetal condition. As the embryo develops, 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 generally be done around 60 days. At this time, you can see whether the gestational sac, fetal bud, and fetal heart are normal. The appearance of a fetal bud is a stage in the normal development of the embryo. If there is no fetal bud now, there may be one next time. However, under normal circumstances, if there is no fetal bud by the due date, it means that the embryo has arrested. The cause of pregnancy arrest is related to many factors, such as egg and sperm quality, antibodies in the body, blood diseases, infectious diseases, pregnancy status, mental stress, drugs, radiation, etc. However, it is usually impossible to confirm the exact cause and we can only rule them out one by one. A large number of tests are required but the real cause may not be found.

The following are the recommended times for ultrasound examinations during pregnancy:

Before 8 weeks of pregnancy: This is a critical period for the formation of fetal organs and an important stage that can easily lead to fetal malformations. Usually, ultrasound examination is not required unless there is vaginal bleeding and abdominal pain, in which case ectopic pregnancy, hydatidiform mole, and miscarriage caused by fibroids need to be ruled out. Patients with pelvic masses or uterine fibroids before or during early pregnancy need B-ultrasound examination to assist in diagnosis and provide a basis for future treatment.

10th to 13th week of pregnancy: Use ultrasound to measure the thickness of the fetal nuchal translucency (NT) and screen for Down syndrome to achieve the purpose of eugenics.

20th to 24th week of pregnancy: Early Down syndrome screening around 20-22 weeks, measuring the fetal nuchal translucency (NF) to screen for Down syndrome. All the organs of the fetus are fully developed, and ultrasound can help us understand the position of the placenta, the growth and development of the fetus in the uterus, including the movement of the fetus in the uterus, heartbeat and limb movements.

24th to 32nd week of pregnancy: Observe the fetal nose, lips, and heart to reveal most anatomical abnormalities and birth defects, such as anencephaly, hydrocephalus, spina bifida, limb deformities, severe cleft lip and palate, congenital heart disease, etc. Expectant mothers with a history of congenital heart disease, fetal arrhythmia and other high-risk factors need to undergo fetal ultrasound cardiography.

After 37 weeks of pregnancy: to determine the fetal position and size, amniotic fluid conditions, whether the umbilical cord is wrapped around the neck, etc., to conduct a final assessment before delivery to determine the mode of delivery, etc. Note: B-ultrasound is not recommended within 3 months of pregnancy (except in special circumstances, such as vaginal spotting in early pregnancy, who needs to undergo B-ultrasound examination to determine whether the embryo is alive, whether the pregnancy can continue, whether there is an abnormal pregnancy or hydatidiform mole, etc.). Multiple B-ultrasounds within 3 months of pregnancy may affect the embryonic cell division and brain formation.

Expectant mothers who have not seen the embryo bud after 45 days of pregnancy should not worry. After reading the above article, you should have learned some relevant knowledge. It is very likely that the embryo bud is not seen after your baby is conceived. Therefore, you must have confidence in yourself and your baby, and you must not let yourself always be in a state of nervousness and fear, which will also affect the baby's development.