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4 jan 2018 ano - Week 4

Descrição:

The zygote attaches itself to the walls of the uterus. The placenta and the umbilical cord begin to form. (Source 1)

Adicionado na linha do tempo:

Biology Timeline 1

ByAdrian Sanchez

9 dez 2017

1

0

575

Data:

4 jan 2018 ano

Agora

~ 7 years and 9 months ago

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