How big is the embryo during one month of pregnancy

If you observe pregnant women carefully, you will find that the body shape of a pregnant woman who has been pregnant for about one month is not much different from that of an ordinary woman, and there is no obvious bulge in the abdomen. This is because the woman has not been pregnant for long, the embryo has just begun to develop in the uterus, and the gestational sac is relatively small, so the pregnancy is generally not obvious. So, how big is the embryo if a woman is one month pregnant?

How big is the baby in one month of pregnancy

Your pregnancy month is 4 weeks from the first day of your last menstrual period. At this time, the fetus in the abdomen is about a few millimeters long, like a small seahorse (the fetus before 7 weeks is called a germ, at this stage the spine and neural groove are being formed). Most pregnant women do not have any symptoms, but a small number may experience symptoms similar to a cold: fatigue, fever, chills, etc. At this time, there is no visible change in the size and shape of the uterus and breasts, and they are almost the same as before pregnancy, with the uterus being about the size of an egg.

Fetal development indicators at 1 week of pregnancy, changes in the expectant mother's body: the uterus is as big as an egg, no different from before pregnancy. Some people will feel nothing, while others will experience symptoms such as fever and swollen breasts. Entering the late second week, you will find that you have entered the ovulation period based on your basal body temperature, and now you should be ready. The basal body temperature method is determined based on the menstrual cycle. The follicles mature approximately on the 5th to 13th day of the menstrual cycle, and the 13th to 20th day is the best pregnancy period. Conception usually only occurs within 24 hours of sexual intercourse. At this time, the sperm and egg have combined to form a fertilized egg, which is 0.1cm in size and very light in weight. During this period, the embryo has already implanted in the uterus, or "implanted." It takes about 4-5 days to complete implantation. After implantation, the embryo grows slowly. At this time, the development of the brain has begun. The fertilized egg continues to divide, one part forms the brain and the other part forms nervous tissue.

How big is the fetus during one month of pregnancy

After the sperm and egg combine to form a fertilized egg, the implanted fertilized egg slowly divides into a multicellular gestational sac. After more than thirty days of pregnancy, the primitive cells differentiate and slowly form a fetal bud, which further develops into a fetal heart. This is the process of a fetus forming. Usually the period from three weeks of pregnancy to the first month of pregnancy is called the embryonic stage. At this time, blood flow signals with heart fluctuations can be seen during B-ultrasound or color ultrasound examinations. Further growth and development will form a fetus. For a normal intrauterine pregnancy, ultrasound examination can usually show the intrauterine embryo and fetal heart tube pulsation at 6-7 weeks of pregnancy. If there is still no embryonic bud or fetal heartbeat after seven weeks of pregnancy, the pregnant mother should consider the possibility of embryonic development arrest and should go to the hospital in time to check the condition of the fetus.

Due to the development of the embryo, the gestational sac is formed on the 30th to 40th day of pregnancy, the embryonic bud is formed on the 40th to 50th day of pregnancy, and the fetal heart is formed on the 50th to 60th day of pregnancy. An ultrasound examination around 40 days after conception revealed that the embryo was 0.5-1 cm in size and shaped like a small seahorse. If no embryo is found, the pregnant mother should pay attention to it. However, there are also cases where some women with irregular menstrual cycles, late ovulation, or late implantation of the fertilized egg will have a relatively delayed appearance of a fetal bud in their uterus and the timing of the fetal heartbeat will also be relatively delayed. It is recommended to observe for a week and then go to the hospital for a follow-up examination.