Thank you for your query.
is definitely contraindicated in early pregnancy
, as it can cause masculinization of a female fetus and other anomalies.
however, your sister has taken a very small dose, and she might want to weight the risk benefit ratio and decide for further continuation vs. termination.
It is advisable to consult a good Medical genetics Specialist
who can tell you the exact risks of anomalies in the fetus after taking multiple factors such as age, medical history, family history etc into consideration.
It would be a calculated risk to continue the pregnancy, however in her case, I would peg the risk as very very low, as she did not take medications for the full 5 days as prescribed.