Recently, science has proven that, without the sperm from a man, the female egg will not develop blood and as a result, the egg will not develop, into a human being. Therefore, when you read, in both the Bible and the Quran, that Mariam, Mary, was a Virgin and was made to have child, by the Power of God, that means that Y'shua's, Jesus', blood, came from God and it was the Godly blood, that caused Mariam's, Mary's, egg to develop into the Messiah, the Son of Man and the Son of God.
Also, contrary to what is taught in Islam, the Quran does teach that Y'shua, was perfect and would be a sign to mankind that God is merciful. Read what the following Quran verses say about Mary and her Son.
"He said, "I am only the messenger of your Lord to give you [news of] a pure boy." She said, "How can I have a boy while no man has touched me and I have not been unchaste?" He said, "Thus [it will be]; your Lord says, 'It is easy for Me, and We will make him a sign to the people and a mercy from Us. And it is a matter [already] decreed.' "So she conceived him, and she withdrew with him to a remote place. Quran 19:19-21
Here, the Quran says that Mariam, Mary, would give birth to a perfect son, and that her son would be mercy from God. That's exactly what the Bible and most Christians proclaim. Y'shua, Jesus, is the perfect Son of God, an avenue, through which God will show his mercy, on all who will place faith, in his promise.
... and that's what you'll find, When You Search For The Truth.