Answered by Shaykh Yūsuf Badāt
How old was Maryam/ Mary (peace and blessings upon her) when she got pregnant with Īsa/ Jesus (peace and blessings upon him)?
Jazāk Allāh Khayr / Thank you for your question.
In response to your concern, it is important to note that there is no clear cut evidence in the Noble Qur’ān or Sunnah [prophetic teachings] providing an answer to this query. However, Islamic scholars and historians have provided indicated to the answer, based on historical accounts of the event.
The great giant of Qur’ānic exegesis, Imam Al Ᾱlūsī Al Baghdādī (may Allāh’s mercy be with him), writes:
“The scholars and historians have differed regarding the precise time when Almighty Allāh sent the angel to blow the soul of Īsa/ Jesus (peace and blessings upon him) into the womb of Maryam/ Mary (peace and blessings upon her). Some have stated, she was thirteen years of age. Wahb and Mujāhid (may Allāh’s mercy be with them) have reported age fifteen. There are also suggestions of age ten and twelve” (Tafsīr Ruḥ Al Ma’ānī)
And Allāh Knows Best