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| Description: The blastocyst remains free in the uterine cavity for about 2 days and then implants by attaching to the endometrium at around 6 days after fertilization. Picture Stats: Views: 211 Filesize: 470.86kB Height: 562 Width: 722 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40484 |