Can medication be continued if pregnancy is not known?

Patient's question:

Pregnancy

Doctor's answer:

For pre-pregnancy and pregnancy medication, it is essential to use drugs cautiously and safely under the guidance of a doctor. The consequences of medication at different times vary: if medication is taken within 1 week after the egg is fertilized, the fertilized egg has not yet implanted in the endometrium and is generally not affected by the drug; if medication is taken within 1-2 weeks after fertilization, the fertilized egg has already implanted in the uterine lining, but the tissue has not yet differentiated. In addition to the risk of miscarriage, the drug does not cause teratogenesis, making this period relatively safe. Therefore, taking some medications before pregnancy or in the very early stages of pregnancy is unlikely to have a significant impact on the fetus, and there is no need to worry excessively.