Fraternal – nonidentical – twins develop from two separate fertilized eggs. By 6 weeks, their hearts are beating, and at 8 weeks all of their major organs start developing. The twins’ faces take shape, with closed eyelids, at 12 weeks, and at 16 weeks their sex organs are apparent. Twins Week Rollover Index Image Diagram - Chart - diagrams and charts with labels. This diagram depicts Twins Week Rollover Index Image and explains the details of Twins Week Rollover Index Image.
Twins Week Rollover Index Image
