Week by Week Ana Bircher, MD Juliana Leite, MD Cerine Jeanty, Article Published: May 16, 2006 Tennessee Women"s Care, Nashville TN These are some images of the development of the embryo in the first trimester of pregnancy. 5 weeks 5 weeks 6 weeks 6 weeks and 0 days 6 weeks 6 weeks 6 weeks and 3 days 6 weeks 3 days 6 weeks and 4 days 6 weeks 4 days 6 weeks and 5 days 6 weeks 5 days 7 weeks 7 weeks and 0 days 7 weeks 7 weeks and 2 days 7 weeks 2 days 7 weeks and 5 days 7 weeks 5 days 8 weeks 8 weeks and 0 days 8 weeks 8 weeks and 1 day 8 weeks 1 day 8 weeks and 2 days 8 weeks 2 days 8 weeks and 3 days 8 weeks 3 days 8 weeks and 4 days 8 weeks 4 days 8 weeks and 5 days 8 weeks 5 days 9 weeks 9 weeks and 1 day 9 weeks 1 day 9 weeks and 2 days 9 weeks 2 day 9 weeks and 5 days 9 weeks 5 day 10 weeks 10 weeks and 1 day 10 weeks 1 day 10 weeks 1 day 10 weeks and 2 days 10 weeks 2 day 10 weeks and 3 days 10 weeks 3 day 10 weeks and 5 days 10 weeks 5 day 11 weeks 11 weeks and 0 days 11 weeks 11 weeks and 2 days 11 weeks 2 day 11 weeks and 4 days 11 weeks 4 day 11 weeks and 5 days 12 weeks 12 weeks and 0 days 12 weeks 12 weeks and 3 days 12 weeks 3 day Discussion Board Start a discussion about this article Add bookmark Bookmarked