In the seventh week of pregnancy, the fetus grows to 65438±0.33cm, and the embryo has the shape of a human embryo, with differentiation of each segment and separation of limbs, and further development of each system. B-ultrasound clearly showed the embryo bud and the fetal heartbeat, and the fetal sac occupied about 1/3 of the uterine cavity.
How to prevent the gestational sac problem?
After getting to know gestational sac, let's talk about gestational sac now. In daily life, there are two main problems about gestational sac: empty gestational sac and small gestational sac. Empty gestational sac is a manifestation of embryonic dysplasia. There are many reasons, such as poor sperm quality and environmental factors, which will affect the development of embryos. Empty pregnancy sacs sometimes appear in the late stage of fertilized eggs. Therefore, in the process of actively preparing for pregnancy, husband and wife should strive to improve sperm quality, ban smoking and alcohol, strengthen physical exercise and keep happy.
Due to the poor development of sperm and eggs, pregnant women are infected with mycoplasma, chlamydia and rubella virus during pregnancy, or pregnant women are exposed to toxic and harmful substances during pregnancy, resulting in poor development of gestational sac, which is less than normal months. In this case, the gestational sac is unhealthy, which will eventually lead to miscarriage. Faced with this situation, prospective parents must find out the specific reasons for the small gestational sac, strive to strengthen their physique during pregnancy, maintain a happy mood, stay away from harmful substances and stay away from the source of the disease.
In the seventh week of pregnancy, the gestational sac size is about 1.33 cm. At this time, there are already limbs, so when the expectant mother checks, the doctor can point out that the fetus can observe by itself and satisfy his curiosity. Many people have problems with their fetal sacs. As long as there are no bad habits in life and stay away from harmful objects, there will be no great harm.