Does the Bible say the life force of Michael the archangel was placed by God in Mary's womb to become Jesus?

Absolutely NOT ! If you listen to the Jehovah's Witnesses your understanding of the Bible is going out the window. Read and study the Bible on your own and you will learn the truth and the truth will set you free. The JW's have really misinterpreted the scriptures so badly that it doesn't even come close to the real message contained there in.