How many months of pregnancy can I have an ultrasound?

When I was a child, my mother often told me that when she was pregnant with me, she said that I was a little troublemaker, disobedient and often "danced" in her belly. My mother also often felt that I was eager to come out from a certain part of her body to see the world. Recently, my friend also often felt that the baby was "dancing" in her belly. She was also very worried about the baby. She told me that she vomited frequently. I often go to the hospital for B-ultrasound. Is it good to do it so early? How many months of pregnancy can I do B-ultrasound? I asked my mother for some experience.

Doing B-ultrasound during pregnancy will not affect the fetus.

B-ultrasound is a type of ultrasound. Generally, you go to the hospital for the first B-ultrasound examination 50 days after the menstruation stops. If the menstruation is regular, you can see the gestational sac, primitive heart tube pulsation and fetal bud.

Between 18 and 24 weeks of pregnancy, you should have a 3D B-ultrasound to check for fetal anomalies. This is a very detailed examination of the baby, including all organs. This is very important and must be done.

At around 32 weeks, there is also a two-dimensional B-ultrasound, which is mainly used to check the baby's development, with a focus on the baby's biparietal diameter, femur length, amniotic fluid index, placental maturity, fetal position, etc.

When the baby is about to be born, there will be another B-ultrasound, which is usually done after 36 weeks. The baby's fetal position, amniotic fluid, biparietal diameter, and femur length are also monitored. These data are all to see whether the baby can be delivered naturally.

In the early stages of pregnancy, in addition to routine gynecological examinations, B-ultrasound should be performed to determine whether the intrauterine pregnancy is normal. For example, if no signs of pregnancy are detected in the uterine cavity, but abnormal echoes are detected outside the uterine cavity, ectopic pregnancy can be diagnosed in combination with other clinical manifestations. Therefore, it is generally recommended to perform B-ultrasound in the early stages of pregnancy to determine whether it is a normal intrauterine pregnancy or twins, hydatidiform mole, etc.

In the second half of pregnancy, around 16 weeks after amenorrhea, another B-ultrasound is needed to determine whether the fetus has any malformations and whether its growth and development are normal. Because if the fetus is found to be abnormal at this time, it is more appropriate to terminate the pregnancy within 20 weeks of amenorrhea.

In the late pregnancy, that is, after 36 weeks of amenorrhea, an ultrasound can determine the amount of amniotic fluid and the function of the placenta. Pregnancy should not be continued if there is too much or too little amniotic fluid, or if the placenta is calcified or dysfunctional. If necessary, a caesarean section is required.

Doing an ultrasound too early during pregnancy will not harm the baby. My mother said that when she was pregnant, she always felt that I was acting up, and every time I started acting up, she would rush to the hospital for a major check-up. My mother said that at that time she would go to check on me once a week. My father was also very worried that I was causing trouble in my mother's belly. My mother said that she really missed that time.