Praise be to Allah.

Shaykh al-Shanqeeti said: 

Part of the wisdom behind the fact that Allaah created ‘Eesa from a woman without a husband was to make that a sign for mankind, i.e., a sign that was indicative of His complete power, and to show that He can create whatever He wills however He wills. If He wills, He can create a person from a female without a male, as He did in the case of ‘Eesa. If He wills, He can create a person from a male without a female, as He did in the case of Hawwa’ (Eve), as He states in the aayah (interpretation of the meaning): 

“and from him (Adam) He created his wife [Hawwa (Eve)]”

[al-Nisaa’ 4:1]

i.e., from that soul, who was Adam, He created his partner, who was Hawwa’. If He wills, He can create a person without a male or a female, as He created Adam. And if He wills, he can create a person from a male and a female, as He did with the rest of the sons of Adam.