Figure 3.

Embryo movement analysis in a natural pregnancy in mice. Location of embryos in uterine horns at fixed time intervals on GD3 and GD4 of a natural pregnancy. Each circle represents an embryo, and circles connected with a line are embryos from the same uterine horn. Blue-white-red colors signify time scale, where blue is the earliest time point on GD3, white is mid-day of GD3, and red is the latest time point on GD4. The left-hand column indicates the time of dissection in hours (h). ‘N’ represents the number of mice, and ‘Ut’ represents the number of uterine horns analyzed for each time point. Dotted lines divide the uterine horns into three equal segments, and percentages for each time point signify the percentage of embryos in each segment. On GD3 at 1500 h, embryos clusters (arrowhead) and embryo scattering (arrow) can be observed. GD: gestational day. Reprinted with permissions from Flores et al. (2020).