I want to conceive a baby girl. Can a child be conceived in Muharam/safar? Kindly also share any duas reference to conceive a beautiful and healthy baby girl.

There is no objection in it.
Do wudhu and read surah Mariam.
In’Sha’Allah Allah will grant you baby girl and make the niyat that In’Sha’Allah I will name her Fatima.
In’Sha’Allah your dua will be answered