some drugs do have certain effects on the fetus. Some harmful substances in certain drugs will enter the fetus through the mother's body and affect the development of the fetus.

For example: aspirin can cause fetal bone malformations; Mianertong can cause congenital heart disease in children; tetracycline can cause fetal bone malformations and yellowing of deciduous teeth; rhubarb can cause miscarriage; streptomycin and kanamycin can both damage The fetus listens to nerves and kidney function; some sulfa drugs can also cause aggravation of jaundice; hormone drugs can induce malformations.

The above-mentioned drugs cause direct damage to the fetus because after the mother takes the drug, the drug can pass through the placenta to the fetus. Its concentration is the same as that in the maternal blood and distributed throughout the fetus. The liver of the fetus has no detoxification ability, but only enzymes. The system works, so the fetus cannot withstand the attack of teratogenic drugs, especially in the first trimester.

Therefore, pregnant women who are sick must ask a doctor for treatment and take the medicine as prescribed by the doctor.

Use the doppler fetal monitor to view the heartbeat of the fetus in the abdomen, observe the fetus at all times, and pay attention to his growth.