Generally, low platelet count does not cause anencephaly, and the cause can be investigated under the guidance of a doctor.
At the beginning of pregnancy, there will be fetal buds and fetal heart on ultrasound around 7 weeks after menopause. However, when the pregnant woman has serious infections, anemia or thrombophilia, or when the embryo is not well developed, the development of the embryo may be affected and result in an absent heart. Thrombocytopenia is a blood system disease, which usually does not cause anencephaly, so when ultrasound indicates anencephaly, the cause can be identified under the guidance of the doctor.
When the ultrasound examination of the embryo without a fetal heart also depends on the pregnant woman’s menstrual cycle, when the menstrual cycle time is long, there may be no fetal heart because of the short time, you can follow the doctor’s advice to repeat the examination after one week, but if the examination is still no fetal heart, it may be the embryo is not well developed or the embryo has been stopped, and it is necessary to combine with the value of the blood HCG (human chorionic gonadotropin) to determine the value.