A small tube- like structure which grows at the place where the embryo fixes itself to the uterus wall.
Foetus
Placenta
Womb
Vas deferens
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Answer:
The blastocyst or vas deferns
Explanation:
The blastocyst or vas deferns implants in the wall of the uterus about 6 days after fertilization. If more than one egg is released and fertilized, the pregnancy involves more than one fetus, usually two (twins). Because the genetic material in each egg and in each sperm is slightly different, each fertilized egg is different.
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