FIG. 58 - Human embryo about 15 days old. |
FIG. 59 - Human embryo, 18 and 21 days old. |
FIG. 60 - Human embryo, 27 to 30 days old. |
FIG. 61 - Human embryo, 31 to 34 days old. |
FIG. 62 - Human embryo of about 6 weeks. |
FIG. 63 - Human embryo about 8 and a half weeks old. |
