27 years ago, we can infer based on trends at the time that it would have been frozen at day 3 (vs day 5 which is more common now depending on the clinic). It

27 years ago, we can infer based on trends at the time that it would have been frozen at day 3 (vs day 5 which is more common now depending on the clinic). It may be at the morula stage of embryonic development.