Mary conceived in Elizabeth's six month.
Luk 1:24 And after those days his wife Elisabeth conceived, and hid herself five months, saying,
Luk 1:25 Thus hath the Lord dealt with me in the days wherein he looked on me, to take away my reproach among men.
Luk 1:26 And in the sixth month the angel Gabriel was sent from God unto a city of Galilee, named Nazareth,