Biology, asked by ekhlaquehussain8216, 8 months ago

: In human female, the blastocyst
1. forms placenta even before implantation
2. gets implanted into uterus three days after ovulation
3. gets nutrition from uterine endometrial secretion only after implantation
4. gets implanted in endometrium by the trophoblast cells

Answers

Answered by ashhinisinghal

1

pls mention the full question so that it is easy to answer

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