first week
implantation,amnion,yolk sac, tissues,placenta
second week
nervous system begins to develop.allantois & blood vessels.
third week
limb buds and heart appear
fourth week
noticeable nose, eyes and earsfifth week
fingers, toes, &cartilage skeleton appear
sixth week
systems developing, bone replacing cartilage, can start to see a face.
two months
gender distinguishable by ultra sound
three months
visible skeleton,hair starts appearing.
four months
heartbeat can be heard
five months
I think the first ten events that happen are significant because they are the developement stages
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